1. Math Rounding
By Grade 4

2. 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”…?

3. Memorize this Poem Find your number. Look right next door.
4 or less, change to 0’s.
5 or more, add 1 more.

4. Round the number 5 871 to the nearest thousand.
Find your number.
5 871
Circle the number in the
thousands place.

5. Round the number 5 871 to the nearest thousand.
Look right next door.
5 871
Draw an arrow to the right of the
number.

6. Round the number 5 871 to the nearest thousand.
4 or less, change to 0’s.
5 871
8 is larger than 4 so go to the next
line of the poem.

7. Round the number 5 871 to the nearest thousand.
5 or more, add 1 more.
5 871
Add 1 to the 5.

8. . Round the number 5 871 to the nearest thousand.
5 or more, add 1 more. +1
5 871
Add 1 to the 5.

9. . Round the number 5 871 to the nearest thousand.
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.

10. The Answer
5 871 rounded to the nearest thousand is
6 000

11. Round the number 2 317 to the nearest thousand.
Find your number.
2 317
Circle the number in the thousands
place.

12. Round the number 2 317 to the nearest thousand.
Look right next door.
2 317
Draw an arrow to the right of the
number.

13. 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.

14. Round the number 2 317 to the nearest thousand
4 or less, just ignore.
Change the numbers to right of 2 to 0’s.

15. The Answer
2 327 rounded to the nearest thousand is
2 000

16. Round the number 3 587 to the nearest hundred
Find your number.
3 587
Circle the number where the hundreds
are.

17. Round the number 3 587 to the nearest hundred
Look right next door.
3 587
Draw an arrow to the right of the
circled number.

18. Round the number 3 587 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.

19. Round the number 3 587 to the nearest hundred.
5 or more, add 1 more. +1
3 587
Since 8 is greater than 5, add 1 to the 5.

20. Round the number 3 587 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.

21. The Answer
3 587 rounded to the
nearest hundred is
3 600

22. Round this number to the nearest ten.
Find your number.
4 875
Circle the number in the tens place.

23. 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.

24. Round the number 4 875 to the nearest ten.
5 is than greater than 4 so go to the next
line of the poem.

25. 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.

26. 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

27. The Answer
4 875 rounded to the nearest ten is
4 880

28. Now try some on your own:
6 218 rounded to the nearest ten is
_ _ _ _

29. Now try some on your own:
6 218 rounded to the nearest ten is
6 220

30. Now try some on your own:
8 015 rounded to the nearest hundred is
_ _ _ _

31. Now try some on your own:
8 015 rounded to the nearest hundred is
8 000

32. Now try some on your own:
2 495 rounded to the nearest thousand is
_ _ _ _

33. Now try some on your own:
2 495 rounded to the nearest thousand is
2 000

34. Do these on paper now: Round to the nearest 1 000
5 789
3 411
6 230
974
6 899

35. Do these on paper now: Round to the nearest 1 000
5 789
3 411
6 230
974
6 899
6 000
3 000
1 000
7 000

36. Do these on paper now: Round to the nearest 100
5 789
3 411
6 230
974
6 899

37. Do these on paper now: Round to the nearest 100
5 800
3 400
6 200
1 000
6 900
5 789
3 411
6 230
974
6 899

38. Do these on paper now: Round to the nearest 10
5 789
3 411
6 230
974
6 899

39. 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