MATHEMATICS Introduction to Multiplication • The aim of this powerpoint is to teach you the 2 to 12 times tables as well.
Download ReportTranscript MATHEMATICS Introduction to Multiplication • The aim of this powerpoint is to teach you the 2 to 12 times tables as well.
Slide 1
MATHEMATICS
Introduction to Multiplication
Slide 2
• The aim of this powerpoint is to teach you the 2 to 12 times
tables as well as highlight some key facts and patterns.
EITHER
• Take notes as you go along, include some examples and write
down any questions and your answers (which you can mark as
you go along) and complete the MyMaths lessons quoted!
OR
• At the end of the powerpoint, printout the notes called Calc5a
Slide 3
What is multiplication?
• Instead of repeatedly adding the same amount each time
we use multiplication (whose symbol is: ×).
• E.g. 5 + 5 + 5 + 5
=
4 lots of 5 = 4 × 5
• E.g. 7 + 7 + 7 = 3 lots of 7 = 3 × 7
• E.g. 2 + 2 + 2 + 2 + 2 + 2 = 6 lots of 2 = 6 × 2
Slide 4
Multiplication is commutative
• When multiplying, it doesn’t matter which order the
numbers are in.
• E.g. 5 × 8 is worth the same as 8 × 5
• This is helpful if you know your 5 times table but are not
so good at your 8 times table!
Slide 5
Terms which tell you to multiply
• Words that tell you to multiply are as follows:
‘lots of’
‘times’
‘multiply’
‘product’
• The word ‘of’ also tells you to multiply particularly when
the calculation involves fractions.
• Other special terms are…
Double which tells you to multiply by 2
Treble or triple which tells you to multiply by 3
Quadruple which tells you to multiply by 4
• Adding the suffix ‘fold’ also tells you to multiply
• E.g. ‘It increased tenfold’ means it was multiplied by 10.
Slide 6
Learning your tables
• The best way to learn your tables is by rote…
• This is repeating them out loud, over and over to yourself
again and again, until your brain simply remembers them.
• The order we recommend you learning them is as follows:
2 then 10 then 5
THEN 11 then 9
THEN 3 then 4
THEN 6, 7, 8 and finally 12
• There are lots of resources and websites that can help
you to learn your tables.
Slide 7
Multiplication Grid
• BEFORE you continue with this powerpoint...
• Save and complete a 12 by 12 multiplication grid (a document
called: Mult12.xlsx) WITHOUT using a calculator
• IMPORTANT: Please TIME how long it takes you to complete
the whole grid. Write the date and time (along with the number
1 on the back of your grid).
• You will be asked to repeat this several times over the next few
lessons to see if you improve your time.
• Continue this powerpoint only AFTER you’ve complete your
timed grid…
Slide 8
Two Times Table
• Here is your 2 times table…
•1×2=2
• 7 × 2 = 14
•2×2=4
• 8 × 2 = 16
•3×2=6
• 9 × 2 = 18
•4×2=8
• 10 × 2 = 20
• 5 × 2 = 10
• 11 × 2 = 22
• 6 × 2 = 12
• 12 × 2 = 24
Slide 9
• All the numbers in the two times table are EVEN
• They all end in 0, 2, 4, 6 or 8
• They can all be halved exactly to give a whole
number answer.
• If numbers end in 1, 3, 5, 7 or 9 they are ODD
• If you need practice at this table, work through the
MyMaths lesson called 2 Times Table found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTables02&taskID=1353
Slide 10
Ten Times Table
• Here is your 10 times table…
• 1 × 10 = 10
• 7 × 10 = 70
• 2 × 10 = 20
• 8 × 10 = 80
• 3 × 10 = 30
• 9 × 10 = 90
• 4 × 10 = 40
• 10 × 10 = 100
• 5 × 10 = 50
• 11 × 10 = 110
• 6 × 10 = 60
• 12 × 10 = 120
Slide 11
• All the numbers in the ten times table are EVEN
and they all end in 0.
• They can all be halved exactly to give a whole
number answer.
• If you multiply ANY whole number by 10, you can
write it out with a zero on the end for the answer.
(Watch out – this trick does NOT work for
decimals!)
• E.g. 512 × 10 = 5120
Slide 12
Five Times Table
• Here is your 5 times table…
•1×5=5
• 7 × 5 = 35
• 2 × 5 = 10
• 8 × 5 = 40
• 3 × 5 = 15
• 9 × 5 = 45
• 4 × 5 = 20
• 10 × 5 = 50
• 5 × 5 = 25
• 11 × 5 = 55
• 6 × 5 = 30
• 12 × 5 = 60
Slide 13
• All the numbers in the five times table end in 5 or 0.
• Some are odd and some are even. If EITHER of the
numbers in the multiplication are even, then the
answer will be even.
• If BOTH numbers in the multiplication are odd, then
the answer will be odd.
• The numbers in the 5 times table are HALF of the
numbers in the 10 times table…
• E.g. 8 × 5 is half of 8 × 10 (i.e. ½ of 80 ) = 40
Slide 14
Three Times Table
• Here is your 3 times table…
•1×3=3
• 7 × 3 = 21
•2×3=6
• 8 × 3 = 24
•3×3=9
• 9 × 3 = 27
• 4 × 3 = 12
• 10 × 3 = 30
• 5 × 3 = 15
• 11 × 3 = 33
• 6 × 3 = 18
• 12 × 3 = 36
Slide 15
• Did you know that if a number is in the 3 times table,
its digits will also add to a total that is in the 3 times
table?
• E.g. Is 45032 in the 3 times table?
Check: 4 + 5 + 0 + 3 + 2 = 14
14 is NOT in the 3 times table
so neither is 45032!
• If you need practice, work through the MyMaths lesson
called 3 Times Table found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTables03&taskID=1357
Slide 16
Four Times Table
• Here is your 4 times table…
•1×4=4
• 7 × 4 = 28
•2×4=8
• 8 × 4 = 32
• 3 × 4 = 12
• 9 × 4 = 36
• 4 × 4 = 16
• 10 × 4 = 40
• 5 × 4 = 20
• 11 × 4 = 44
• 6 × 4 = 24
• 12 × 4 = 48
Slide 17
• As 4 is an even number, ALL the numbers in the
four times table are even (so they can all be
halved exactly to give a whole number answer).
• The numbers in the 4 times table are DOUBLE
the numbers in the 2 times table…
• E.g. 8 × 4 is double 8 × 2, i.e. double 16 = 32
Slide 18
Eleven Times Table
• Here is your 11 times table…
• 1 × 11 = 11
• 7 × 11 = 77
• 2 × 11 = 22
• 8 × 11 = 88
• 3 × 11 = 33
• 9 × 11 = 99
• 4 × 11 = 44
• 10 × 11 = 110
• 5 × 11 = 55
• 11 × 11 = 121
• 6 × 11 = 66
• 12 × 11 = 132
Slide 19
• Did you notice that up to 9 x 11 = 99, the tens and
units digits are the same?
• The numbers in the 11 times table are the numbers in
the 10 times and 1 times tables added together…
• E.g. 8 × 11 is (8 × 10) + (8 × 1)
80
+
8
= 88
• Ask your teacher (or read through the Calc5a notes
carefully) to demonstrate the quick method for
multiplying any 2-digit number by 11!
Slide 20
Nine Times Table
• Here is your 9 times table…
•1×9= 9
• 7 × 9 = 63
• 2 × 9 = 18
• 8 × 9 = 72
• 3 × 9 = 27
• 9 × 9 = 81
• 4 × 9 = 36
• 10 × 9 = 90
• 5 × 9 = 45
• 11 × 9 = 99
• 6 × 9 = 54
• 12 × 9 = 108
Slide 21
• Did you notice that as the tens values increase by 1, the
units values decrease by 1 and that up to ’90’, the two digits
add up to 9?
• Like the 3 times table, when you add the digits of any
number together, if their total is in the 9 times table so is the
original number!
• The numbers in the 9 times table are the difference between
the numbers in the 10 times and 1 times tables…
• E.g. 7 × 9 is (7 × 10) – (7 × 1)
70
–
7
= 63
• Ask your teacher (or read through the Calc5a notes) to show
you the ‘fingers’ method for the 9 times table!
Slide 22
Six Times Table
• Here is your 6 times table…
•1×6= 6
• 7 × 6 = 42
• 2 × 6 = 12
• 8 × 6 = 48
• 3 × 6 = 18
• 9 × 6 = 54
• 4 × 6 = 24
• 10 × 6 = 60
• 5 × 6 = 30
• 11 × 6 = 66
• 6 × 6 = 36
• 12 × 6 = 72
Slide 23
• As 6 is an even number, ALL the numbers in the four
times table are even (so they can all be halved exactly to
give a whole number answer).
• The numbers in the 6 times table are DOUBLE the
numbers in the 3 times table…
• E.g. 8 × 6 is
double 8 × 3
double 24 = 48
• If you need practice, work through the MyMaths lesson
called 6 Times Table found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTables06&taskID=1359
Slide 24
Seven Times Table
• Here is your 7 times table…
•1×7= 7
• 7 × 7 = 49
• 2 × 7 = 14
• 8 × 7 = 56
• 3 × 7 = 21
• 9 × 7 = 63
• 4 × 7 = 28
• 10 × 7 = 70
• 5 × 7 = 35
• 11 × 7 = 77
• 6 × 7 = 42
• 12 × 7 = 84
Slide 25
• I’m afraid that the 7 times table does not have
any patterns in it – you will need to learn it by rote
or use all your knowledge of all the other tables to
work out its values.
• If you need practice, work through the MyMaths
lesson called 7 Times Table found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTables07&taskID=1361
Slide 26
• Are you good at doubling (i.e. multiplying by 2) and
can you multiply by 5 easily?
• The numbers in the 7 times table are either the
numbers in the 5 and 2 times tables added
together…
• E.g. 6 × 7 is (6 × 5) + (6 × 2)
30 + 12 = 42
• OR
• the difference between the numbers in the 10 and 3
times tables…
• E.g. 6 × 7 is (6 × 10) – (6 × 3)
60 – 18 = 42
Slide 27
Eight Times Table
• Here is your 8 times table…
•1×8= 8
• 7 × 8 = 56
• 2 × 8 = 16
• 8 × 8 = 64
• 3 × 8 = 24
• 9 × 8 = 72
• 4 × 8 = 32
• 10 × 8 = 80
• 5 × 8 = 40
• 11 × 8 = 88
• 6 × 8 = 48
• 12 × 8 = 96
Slide 28
• As 8 is an even number, ALL the numbers in the four
times table are even (so they can all be halved exactly to
give a whole number answer).
• The numbers in the 8 times table are DOUBLE the
numbers in the 4 times table which are in turn, double the
numbers in the 2 times table…
• E.g. 7 × 8 is
double 7 × 4
which is…
double double 7 × 2
double double 14 double 28 = 56
• The numbers in the 8 times table are the difference
between the numbers in the 10 and 2 times tables…
• E.g. 7 × 8 is (7 × 10) – (7 × 2)
70 – 14 = 56
Slide 29
Twelve Times Table
• Here is your 12 times table…
• 1 × 12 = 12
• 7 × 12 = 84
• 2 × 12 = 24
• 8 × 12 = 96
• 3 × 12 = 36
• 9 × 12 = 108
• 4 × 12 = 48
• 10 × 12 = 120
• 5 × 12 = 60
• 11 × 12 = 132
• 6 × 12 = 72
• 12 × 12 = 144
Slide 30
• As 12 is an even number, ALL the numbers in the 12
times table are even (so they can all be halved exactly to
give a whole number answer).
• The numbers in the 12 times table are DOUBLE the
numbers in the 6 times table which in turn are double the
numbers in the 3 times table…
• E.g. 8 × 12 is
double 8 × 6 which is…
double double 8 × 3
double double 24 double 49 = 96
• The numbers in the 12 times table are the numbers in the
10 times and 2 times tables added together…
• E.g. 8 × 12 is (8 × 10) + (8 × 2)
80 + 16
= 96
Slide 31
What next?
• If you haven’t made any notes or copied any examples, questions and
answers out during this presentation, print out the notes called
Calc5a. Read through them and make sure you answer any
questions.
• To practice your tables, in addition to the MyMaths lessons already
listed throughout this powerpoint, please work through the following
ones too…
• Mixed Tables 2,5,10 found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTablesBronze&taskID=1356
• Mixed Tables 3,4,6 found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTablesSilver&taskID=1360
• Mixed Tables 7,8,9 found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTablesGold&taskID=1364
• Mixed Tables 2 to 12 found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTablesDiamond&taskID=1367
• Now move on to the Calc5b-MentalM powerpoint
MATHEMATICS
Introduction to Multiplication
Slide 2
• The aim of this powerpoint is to teach you the 2 to 12 times
tables as well as highlight some key facts and patterns.
EITHER
• Take notes as you go along, include some examples and write
down any questions and your answers (which you can mark as
you go along) and complete the MyMaths lessons quoted!
OR
• At the end of the powerpoint, printout the notes called Calc5a
Slide 3
What is multiplication?
• Instead of repeatedly adding the same amount each time
we use multiplication (whose symbol is: ×).
• E.g. 5 + 5 + 5 + 5
=
4 lots of 5 = 4 × 5
• E.g. 7 + 7 + 7 = 3 lots of 7 = 3 × 7
• E.g. 2 + 2 + 2 + 2 + 2 + 2 = 6 lots of 2 = 6 × 2
Slide 4
Multiplication is commutative
• When multiplying, it doesn’t matter which order the
numbers are in.
• E.g. 5 × 8 is worth the same as 8 × 5
• This is helpful if you know your 5 times table but are not
so good at your 8 times table!
Slide 5
Terms which tell you to multiply
• Words that tell you to multiply are as follows:
‘lots of’
‘times’
‘multiply’
‘product’
• The word ‘of’ also tells you to multiply particularly when
the calculation involves fractions.
• Other special terms are…
Double which tells you to multiply by 2
Treble or triple which tells you to multiply by 3
Quadruple which tells you to multiply by 4
• Adding the suffix ‘fold’ also tells you to multiply
• E.g. ‘It increased tenfold’ means it was multiplied by 10.
Slide 6
Learning your tables
• The best way to learn your tables is by rote…
• This is repeating them out loud, over and over to yourself
again and again, until your brain simply remembers them.
• The order we recommend you learning them is as follows:
2 then 10 then 5
THEN 11 then 9
THEN 3 then 4
THEN 6, 7, 8 and finally 12
• There are lots of resources and websites that can help
you to learn your tables.
Slide 7
Multiplication Grid
• BEFORE you continue with this powerpoint...
• Save and complete a 12 by 12 multiplication grid (a document
called: Mult12.xlsx) WITHOUT using a calculator
• IMPORTANT: Please TIME how long it takes you to complete
the whole grid. Write the date and time (along with the number
1 on the back of your grid).
• You will be asked to repeat this several times over the next few
lessons to see if you improve your time.
• Continue this powerpoint only AFTER you’ve complete your
timed grid…
Slide 8
Two Times Table
• Here is your 2 times table…
•1×2=2
• 7 × 2 = 14
•2×2=4
• 8 × 2 = 16
•3×2=6
• 9 × 2 = 18
•4×2=8
• 10 × 2 = 20
• 5 × 2 = 10
• 11 × 2 = 22
• 6 × 2 = 12
• 12 × 2 = 24
Slide 9
• All the numbers in the two times table are EVEN
• They all end in 0, 2, 4, 6 or 8
• They can all be halved exactly to give a whole
number answer.
• If numbers end in 1, 3, 5, 7 or 9 they are ODD
• If you need practice at this table, work through the
MyMaths lesson called 2 Times Table found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTables02&taskID=1353
Slide 10
Ten Times Table
• Here is your 10 times table…
• 1 × 10 = 10
• 7 × 10 = 70
• 2 × 10 = 20
• 8 × 10 = 80
• 3 × 10 = 30
• 9 × 10 = 90
• 4 × 10 = 40
• 10 × 10 = 100
• 5 × 10 = 50
• 11 × 10 = 110
• 6 × 10 = 60
• 12 × 10 = 120
Slide 11
• All the numbers in the ten times table are EVEN
and they all end in 0.
• They can all be halved exactly to give a whole
number answer.
• If you multiply ANY whole number by 10, you can
write it out with a zero on the end for the answer.
(Watch out – this trick does NOT work for
decimals!)
• E.g. 512 × 10 = 5120
Slide 12
Five Times Table
• Here is your 5 times table…
•1×5=5
• 7 × 5 = 35
• 2 × 5 = 10
• 8 × 5 = 40
• 3 × 5 = 15
• 9 × 5 = 45
• 4 × 5 = 20
• 10 × 5 = 50
• 5 × 5 = 25
• 11 × 5 = 55
• 6 × 5 = 30
• 12 × 5 = 60
Slide 13
• All the numbers in the five times table end in 5 or 0.
• Some are odd and some are even. If EITHER of the
numbers in the multiplication are even, then the
answer will be even.
• If BOTH numbers in the multiplication are odd, then
the answer will be odd.
• The numbers in the 5 times table are HALF of the
numbers in the 10 times table…
• E.g. 8 × 5 is half of 8 × 10 (i.e. ½ of 80 ) = 40
Slide 14
Three Times Table
• Here is your 3 times table…
•1×3=3
• 7 × 3 = 21
•2×3=6
• 8 × 3 = 24
•3×3=9
• 9 × 3 = 27
• 4 × 3 = 12
• 10 × 3 = 30
• 5 × 3 = 15
• 11 × 3 = 33
• 6 × 3 = 18
• 12 × 3 = 36
Slide 15
• Did you know that if a number is in the 3 times table,
its digits will also add to a total that is in the 3 times
table?
• E.g. Is 45032 in the 3 times table?
Check: 4 + 5 + 0 + 3 + 2 = 14
14 is NOT in the 3 times table
so neither is 45032!
• If you need practice, work through the MyMaths lesson
called 3 Times Table found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTables03&taskID=1357
Slide 16
Four Times Table
• Here is your 4 times table…
•1×4=4
• 7 × 4 = 28
•2×4=8
• 8 × 4 = 32
• 3 × 4 = 12
• 9 × 4 = 36
• 4 × 4 = 16
• 10 × 4 = 40
• 5 × 4 = 20
• 11 × 4 = 44
• 6 × 4 = 24
• 12 × 4 = 48
Slide 17
• As 4 is an even number, ALL the numbers in the
four times table are even (so they can all be
halved exactly to give a whole number answer).
• The numbers in the 4 times table are DOUBLE
the numbers in the 2 times table…
• E.g. 8 × 4 is double 8 × 2, i.e. double 16 = 32
Slide 18
Eleven Times Table
• Here is your 11 times table…
• 1 × 11 = 11
• 7 × 11 = 77
• 2 × 11 = 22
• 8 × 11 = 88
• 3 × 11 = 33
• 9 × 11 = 99
• 4 × 11 = 44
• 10 × 11 = 110
• 5 × 11 = 55
• 11 × 11 = 121
• 6 × 11 = 66
• 12 × 11 = 132
Slide 19
• Did you notice that up to 9 x 11 = 99, the tens and
units digits are the same?
• The numbers in the 11 times table are the numbers in
the 10 times and 1 times tables added together…
• E.g. 8 × 11 is (8 × 10) + (8 × 1)
80
+
8
= 88
• Ask your teacher (or read through the Calc5a notes
carefully) to demonstrate the quick method for
multiplying any 2-digit number by 11!
Slide 20
Nine Times Table
• Here is your 9 times table…
•1×9= 9
• 7 × 9 = 63
• 2 × 9 = 18
• 8 × 9 = 72
• 3 × 9 = 27
• 9 × 9 = 81
• 4 × 9 = 36
• 10 × 9 = 90
• 5 × 9 = 45
• 11 × 9 = 99
• 6 × 9 = 54
• 12 × 9 = 108
Slide 21
• Did you notice that as the tens values increase by 1, the
units values decrease by 1 and that up to ’90’, the two digits
add up to 9?
• Like the 3 times table, when you add the digits of any
number together, if their total is in the 9 times table so is the
original number!
• The numbers in the 9 times table are the difference between
the numbers in the 10 times and 1 times tables…
• E.g. 7 × 9 is (7 × 10) – (7 × 1)
70
–
7
= 63
• Ask your teacher (or read through the Calc5a notes) to show
you the ‘fingers’ method for the 9 times table!
Slide 22
Six Times Table
• Here is your 6 times table…
•1×6= 6
• 7 × 6 = 42
• 2 × 6 = 12
• 8 × 6 = 48
• 3 × 6 = 18
• 9 × 6 = 54
• 4 × 6 = 24
• 10 × 6 = 60
• 5 × 6 = 30
• 11 × 6 = 66
• 6 × 6 = 36
• 12 × 6 = 72
Slide 23
• As 6 is an even number, ALL the numbers in the four
times table are even (so they can all be halved exactly to
give a whole number answer).
• The numbers in the 6 times table are DOUBLE the
numbers in the 3 times table…
• E.g. 8 × 6 is
double 8 × 3
double 24 = 48
• If you need practice, work through the MyMaths lesson
called 6 Times Table found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTables06&taskID=1359
Slide 24
Seven Times Table
• Here is your 7 times table…
•1×7= 7
• 7 × 7 = 49
• 2 × 7 = 14
• 8 × 7 = 56
• 3 × 7 = 21
• 9 × 7 = 63
• 4 × 7 = 28
• 10 × 7 = 70
• 5 × 7 = 35
• 11 × 7 = 77
• 6 × 7 = 42
• 12 × 7 = 84
Slide 25
• I’m afraid that the 7 times table does not have
any patterns in it – you will need to learn it by rote
or use all your knowledge of all the other tables to
work out its values.
• If you need practice, work through the MyMaths
lesson called 7 Times Table found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTables07&taskID=1361
Slide 26
• Are you good at doubling (i.e. multiplying by 2) and
can you multiply by 5 easily?
• The numbers in the 7 times table are either the
numbers in the 5 and 2 times tables added
together…
• E.g. 6 × 7 is (6 × 5) + (6 × 2)
30 + 12 = 42
• OR
• the difference between the numbers in the 10 and 3
times tables…
• E.g. 6 × 7 is (6 × 10) – (6 × 3)
60 – 18 = 42
Slide 27
Eight Times Table
• Here is your 8 times table…
•1×8= 8
• 7 × 8 = 56
• 2 × 8 = 16
• 8 × 8 = 64
• 3 × 8 = 24
• 9 × 8 = 72
• 4 × 8 = 32
• 10 × 8 = 80
• 5 × 8 = 40
• 11 × 8 = 88
• 6 × 8 = 48
• 12 × 8 = 96
Slide 28
• As 8 is an even number, ALL the numbers in the four
times table are even (so they can all be halved exactly to
give a whole number answer).
• The numbers in the 8 times table are DOUBLE the
numbers in the 4 times table which are in turn, double the
numbers in the 2 times table…
• E.g. 7 × 8 is
double 7 × 4
which is…
double double 7 × 2
double double 14 double 28 = 56
• The numbers in the 8 times table are the difference
between the numbers in the 10 and 2 times tables…
• E.g. 7 × 8 is (7 × 10) – (7 × 2)
70 – 14 = 56
Slide 29
Twelve Times Table
• Here is your 12 times table…
• 1 × 12 = 12
• 7 × 12 = 84
• 2 × 12 = 24
• 8 × 12 = 96
• 3 × 12 = 36
• 9 × 12 = 108
• 4 × 12 = 48
• 10 × 12 = 120
• 5 × 12 = 60
• 11 × 12 = 132
• 6 × 12 = 72
• 12 × 12 = 144
Slide 30
• As 12 is an even number, ALL the numbers in the 12
times table are even (so they can all be halved exactly to
give a whole number answer).
• The numbers in the 12 times table are DOUBLE the
numbers in the 6 times table which in turn are double the
numbers in the 3 times table…
• E.g. 8 × 12 is
double 8 × 6 which is…
double double 8 × 3
double double 24 double 49 = 96
• The numbers in the 12 times table are the numbers in the
10 times and 2 times tables added together…
• E.g. 8 × 12 is (8 × 10) + (8 × 2)
80 + 16
= 96
Slide 31
What next?
• If you haven’t made any notes or copied any examples, questions and
answers out during this presentation, print out the notes called
Calc5a. Read through them and make sure you answer any
questions.
• To practice your tables, in addition to the MyMaths lessons already
listed throughout this powerpoint, please work through the following
ones too…
• Mixed Tables 2,5,10 found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTablesBronze&taskID=1356
• Mixed Tables 3,4,6 found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTablesSilver&taskID=1360
• Mixed Tables 7,8,9 found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTablesGold&taskID=1364
• Mixed Tables 2 to 12 found at:
http://www.mymaths.co.uk/tasks/library/loadLesson.asp?title=MultiplyDivide/timesTablesDiamond&taskID=1367
• Now move on to the Calc5b-MentalM powerpoint