Transcript Math Flash Rounding By Monica Yuskaitis & Deborah Sullivan Use rounding • When the question asks you to estimate. • When the question asks “about how many”…? • When.

Math Flash
Rounding
By Monica Yuskaitis
&
Deborah Sullivan
Use rounding
• When the question asks you
to estimate.
• When the question asks
“about how many”…?
• When an exact answer isn’t
possible.
• When an answer is difficult
to obtain.
Memorize this Poem
Find your number.
Look right next door.
4 or less just ignore.
5 or more, add 1 more.
Round this number to the nearest
ten thousand.
54Look
or
add
1 more.
ormore,
less,
right
just
next
ignore.
door.
Find
your
number.
+1
37
6 0,0
8,9 0
70
1
Add
8Draw
is larger
Since
1 an
to the
arrow
8than
is
6 and
greater
4under
soallgothe
than
to number
numbers
5, ten
next
Underline
the
number
in
the
totothe
theright
right
line
add
ofof
ofthe
1the
the
tounderlined
the
7poem.
become
6.
digit.
0’s.
thousands
place.
The Answer
368,971 rounded to the
nearest ten thousand is
3 7 0,0 0 0
Round this number to the nearest
thousand.
Find your number.
3 5, 3 2 7
Underline the number in the
thousands place.
Round this number to the nearest
thousand.
Look
4
or less,
rightjust
next
ignore.
door.
3 5, 0
30
20
7
Draw
All Since
the
an arrow
numbers
3 is to
less
the
tothan
the
right
right
4,of the
of
weunderlined
do
thenot
5 become
change
number.
0’s.
the 5.
The Answer
35,327 rounded to the
nearest thousand is
3 5, 0 0 0
Round this number to the nearest
dollar.
4
5Look
or
Find
or less,
more,
right
your
just
add
next
number.
ignore.
1 door.
more.
+1
$ 6.
5. 0
87
0
8Draw
is Underline
greater
Since
an arrow
is the
greater
so
thegothan
right
to that
the
5,of next
thethe
Change
the
58than
to
a 4to
6number
and
change
all
underlined
represents
line
add of
1 to
thethe
number.
dollars.
poem.
5. to 0’s.
numbers
to
right
The Answer
$5.87 rounded to the
nearest dollar is
$ 6. 0 0
Round this number to the nearest
tenth place.
Look
5
4or
Find
ormore,
less
right
your
just
next
add
number.
ignore.
1door.
more.
+1
4.8
4.9 7
7Change
Draw
isUnderline
greater
Since
anthe
arrow
7than
8isthe
to
greater
4,
toanumber
so
9,
theand
go
than
right
toin
drop
the
5,
the
of the
next
numbers
underlined
line
add
tenths
toof1the
the
toplace.
right
number.
the
poem.
8.of the 9.
Round to the nearest…

3,582
thousand

480
hundred

28,456 thousand

45,894 ten thousand