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### Math Rounding

By Grade 4

Use rounding

- When the question asks you
to estimate.

- To check your answer to see if you’ve made a mistake.

When an exact answer isn’t possible.

When the question asks “about how many”…?

Memorize this Poem

Find your number.

Look right next door.

4 or less, change to 0’s.

5 or more, add 1 more.

Round the number 5 871 to the nearestthousand.

Find your number.

5 871

Circle the number in the

thousands place.

Round the number 5 871 to the nearestthousand.

Look right next door.

5 871

Draw an arrow to the right of the

number.

Round the number 5 871 to the nearestthousand.

4 or less, change to 0’s.

5 871

8 is larger than 4 so go to the next

line of the poem.

. Round the number 5 871 to the nearestthousand.

5 or more, add 1 more.

+1

6 000

Add 1 to the 5 ( to make 6) and all the numbers

to the right of the 6 become 0’s.

Round the number 2 317 to the nearest thousand.

Find your number.

2 317

Circle the number in the thousands

place.

Round the number 2 317 to the nearest thousand.

Look right next door.

2 317

Draw an arrow to the right of the

number.

Round the number 2 317 to the nearest thousand

4 or less, change to 0’s.

2 317

Since 3 is less than 4, we ignore the 2

and change the rest to 0’s.

Round the number 2 317 to the nearest thousand

4 or less, just ignore.

2 0 0 0

Change the numbers to right of 2 to 0’s.

Round the number 3587 to the nearest hundred

Find your number.

3 587

Circle the number where the hundreds

are.

Round the number 3587 to the nearest hundred

Look right next door.

3 587

Draw an arrow to the right of the

circled number.

Round the number 3587 to the nearest hundred

4 or less, change to 0’s.

3 587

8 is greater than 4 so go to the next

line of the poem.

Round the number 3587 to the nearest hundred.

5 or more, add 1 more.

+1

3 587

Since 8 is greater than 5, add 1 to the

5.

Round the number 3587 to the nearest hundred

5 or more, add 1 more.

3 600

Change the 5 to a 6 and change all the

numbers to the right to 0’s.

Round the number 4 875 to the nearest ten.

Look right next door.

4 875

Draw an arrow to the right of the

circled number.

Round the number 4 875 to the nearest ten.

4 875

5 is than greater than 4 so go to the next

line of the poem.

Round the number 4 875 to the nearest ten.

5 or more, add 1 more.

+1

4 875

Since 5 is equal to 5, add 1 to the

7.

Round the number 4 875 to the nearest ten.

5 or more, add 1 more.

4 880

Change the 7 to a 8 and make the rest 0’s

Do these on paper now:Round to the nearest 1 000

- 5789
- 3411
- 6230
- 974
- 6 899

Do these on paper now:Round to the nearest 1 000

- 5789
- 3411
- 6230
- 974
- 6 899

6000

3000

6000

1 000

7 000

Do these on paper now:Round to the nearest 100

- 5 789
- 3 411
- 6 230
- 974
- 6 899

Do these on paper now:Round to the nearest 100

5 800

3 400

6 200

1000

6 900

- 5 789
- 3 411
- 6 230
- 974
- 6 899

Do these on paper now:Round to the nearest 10

- 5 789
- 3 411
- 6 230
- 974
- 6 899

Do these on paper now:Round to the nearest 10

5 790

3 410

6 230

980

6 900

- 5 789
- 3 411
- 6 230
- 974
- 6 899

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