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RoundingRounding
When do you use When do you use rounding?rounding?
•When the question asks you to round. •When the question asks you to estimate.• When the question asks “about how many”…?• To find out ABOUT what your answer should be.
Memorize this PoemMemorize 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 Round this number to the nearestnearest
tenten..
Find your number. 9 7 8
Circle the number in the tens place.
Round this number to the Round this number to the nearestnearest
tenten..
Look right next door.
9 7 8
Draw an arrow to the right of the number.
Round this number to the Round this number to the nearestnearest
tenten..
4 or less, just ignore.
9 7 8
8 is larger than 4 so go to the next line of the poem.
Round this number to the Round this number to the nearestnearest
tenten..
5 or more, add 1 more.
9 7 8Add 1 to the 7.
+1
Round this number to the Round this number to the nearestnearest
tenten..
5 or more, add 1 more.
9 8 0Add 1 to the 7 and all the
numbers to the right of the 8 become 0’s.
The AnswerThe Answer
978 rounded to the nearest ten is
980
Round this number to the Round this number to the nearestnearest
hundredhundred..
Find your number.
3 2 7Circle the number in the hundreds
place.
Round this number to the Round this number to the nearestnearest
hundredhundred..
Look right next door.
3 2 7Draw an arrow to the right of the
number.
Round this number to the Round this number to the nearestnearest
hundredhundred..
4 or less, just ignore.
3 2 7
Since 2 is less than 4 we do not change the 3.
Round this number to the Round this number to the nearestnearest
hundredhundred..
4 or less, just ignore.
3 0 0Change the numbers to
rightof 3 to 0’s.
The AnswerThe Answer
327 rounded to the nearest hundred is
3 0 0
Let’s practiceLet’s practice
Round this number to the Round this number to the nearestnearest
tenten..
564A. 560 B. 500
C. 570 D. 600
Round this number to the Round this number to the nearestnearest
hundredhundred..
1,792A. 1,700
B. 1,790
C. 1,800
D. 2,000
Round this number to the Round this number to the nearestnearest
tenten..
406A. 400 B. 500
C. 410 D. 600
Round this number to the Round this number to the nearestnearest
hundredhundred..
714A. 720 B. 710
C. 800 D. 700
Round this number to the Round this number to the nearestnearest
tenten..
227A. 200 B. 230
C. 220 D. 300
Round this number to the Round this number to the nearestnearest
hundredhundred..
1,131A. 1,130
B. 100
C. 1,100
D. 1,200
Round this number to the Round this number to the nearestnearest
tenten..
911A. 910 B. 920
C. 900 D. 1,000
Round this number to the Round this number to the nearestnearest
hundredhundred..
952A. 900 B.
1,000C. 950 D. 960
Round this number to the Round this number to the nearestnearest
tenten..
797A. 790 B. 700
C. 800 D. 710
