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.


tenten..

Look right next door.

9 7 8Draw an arrow to the right of the

number.


tenten..

4 or less, just ignore.9 7 8

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


tenten..

5 or more, add 1 more.

9 7 8Add 1 to the 7.

+1


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


hundredhundred..

Find your number.

3 2 7Circle the number in the hundreds

place.


hundredhundred..

Look right next door.

3 2 7Draw an arrow to the right of the

number.


hundredhundred..4 or less, just ignore.3 2 7

Since 2 is less than 4 we do not change the 3.


hundredhundred..

4 or less, just ignore.3 0 0

Change the numbers to right

of 3 to 0’s.


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


tenten..

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


hundredhundred..

1,792A. 1,700

B. 1,790C. 1,800

D. 2,000


tenten..

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


hundredhundred..

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


tenten..

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


hundredhundred..

1,131A. 1,130

B. 100C. 1,100

D. 1,200


tenten..

911A. 910 B. 920C. 900 D. 1,000


hundredhundred..

952A. 900 B.

1,000C. 950 D. 960


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.


Look right next door.£ 5. 8 7

Draw an arrow to the right of the circled number.


4 or less, just ignore.£ 5. 8 7

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


5 or more, add 1 more.£ 5. 8 7

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

+1


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.


£5.87 rounded to thenearest pound

is£ 6. 0 0

Created by Richard Bull

1d. rounding

Education

Transcript of 1d. rounding