1d. rounding

Rounding

Created by Richard Bull

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 8Draw 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 0

Add 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 0

Change the numbers to right

of 3 to 0’s.

The AnswerThe Answer

327 rounded to the nearest hundred is

3 0 0

Let’s practiceLet’s practicePractice 1Practice 2Practice 3Practice 4

Practice 5Practice 6Practice 7Practice 8

Practice 9 Bonus: See how to round money

Round this number to the Round this number to the nearestnearest

tenten..

564A. 560 B. 500C. 570 D. 600

Round this number to the Round this number to the nearestnearest

hundredhundred..

1,792A. 1,700

B. 1,790C. 1,800

D. 2,000

Round this number to the Round this number to the nearestnearest

tenten..

406A. 400 B. 500C. 410 D. 600

Round this number to the Round this number to the nearestnearest

hundredhundred..

714A. 720 B. 710C. 800 D. 700

Round this number to the Round this number to the nearestnearest

tenten..

227A. 200 B. 230C. 220 D. 300

Round this number to the Round this number to the nearestnearest

hundredhundred..

1,131A. 1,130

B. 100C. 1,100

D. 1,200

Round this number to the Round this number to the nearestnearest

tenten..

911A. 910 B. 920C. 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. 700C. 800 D. 710

You got it right!You got it right!Good Work!Good Work!

Sorry, try againSorry, try again

Round this number to the Round this number to the nearestnearestpoundpound..

Find your number.£ 5. 8 7

Circle the number where the dollars are.

Round this number to the Round this number to the nearestnearestpoundpound..

Look right next door.£ 5. 8 7

Draw an arrow to the right of the circled number.

Round this number to the Round this number to the nearestnearestpoundpound..

4 or less, just ignore.£ 5. 8 7

8 is greater than 4 so go to the next line of the poem.

Round this number to the Round this number to the nearestnearestpoundpound..

5 or more, add 1 more.£ 5. 8 7

Since 8 is greater than 5 add 1 to the 5.

+1

Round this number to the Round this number to the nearestnearestpoundpound..

5 or more, add 1 more.£ 6. 0 0Change the 5 to a 6 and

change all the numbers to the right to 0’s.

The AnswerThe Answer

£5.87 rounded to thenearest pound

is£ 6. 0 0

Created by Richard Bull