Transcript Warm Up - GeoGebra

Lesson 3.9
Fractions and Decimals
SSS: M.A.A.1.3.2
M.A.A.1.3.4
Warm Up
Write as an
Improper Fraction:
1)
3
5
8
2
2) 6

3
Write as a Mixed
Number (Simplest Form):
=
43
8
3)
=
20
3
4)

*Remember: (around the world with TP)
Numerator = bottom Times whole Plus top
Denominator stays the same


57
8
86
 3
=
1
7
8
=
2
28
3
*Remember:
Whole number: # of times denominator
goes into numerator.
Numerator = the remainder after dividing
Denominator stays the same

To change a fraction to a decimal, divide
the numerator by the denominator.
Example:
5
8
=
0.625
85.000
= .625
*Remember:
number ALWAYS
The top
gets “caught” in the division box.

Also: when dividing don’t forget your decimal, line up your
answer, and add zeros as needed to bring down.
Here is another example and a few to try.
*remember- divide the numerator by the denominator.
Example:
0.75
3
 43.00  .75
4
Now you try a few:
7
1.
8


0.875
 87.000  .875
2.

0.36
9
 259.00  .36
25
3.

2
5
0.4
 52.0  .4
A decimal that stops or “terminates” is a
terminating decimal
If the same block of digits in a decimal
repeats without end, the decimal is a
repeating decimal
Show a repeating block by putting a bar over the
repeating digits.
0.333...
1
= 31.000... =
Example:
3
.3
Is this a repeating decimal????
3.03003000300003…
Try a few:




5
1)
15
=
.18
(.18181818…)
5
2)
15
=
.3
(.3333333…)
= .583
(.5833333…)
3)
7
12
Changing a Decimal into a fraction
•First write the number on the left of the
decimal as the whole number.
•Next, write the decimal amount as a
numerator.
•Then for the denominator write the
number 1 and add a zero for each place
value to the right of the decimal.
•Finally: simplify the fraction if necessary.
Example:
2.48
48
12
= 2
= 2
100
25
Try a few…
Change the following decimals into fractions:
*Don’t forget to simplify
1) 4.7
7
4
10
2) 9.75
75
3
9
9
100
4
3) 1.36
36
9
1
1
100
25
Comparing Fractions and Decimals
To compare values:
•First, change ALL to either decimals or
fractions.
•Then, compare and write your list
according to directions…least to greatest
or greatest to least.
•Finally, write the list in the original form
that it was in the problem.
Here is one to try…
Put the following in order from least to
greatest
3.23,

3.23,

1
5
10
1
3
4
, 5.75,

1
3
4
, 5.015,

, 5.015
1
5
10
, 5.75