Rounding Numbers - Discussion + Activity

2. Rounding a number is giving
an estimate or a number
that is near or close to the
actual number.

4. Find your number.
Look right next door.
4 or less you just ignore.
5 or up, add 1 more.
Are we done yet?
No not quite.
Add zeros to the right.
That’s how we round off.

5. Rounding Off
Numbers

6. If the digit being rounded off is
followed by number 0, 1, 2, 3 or
4, round down the digit.
*This means to just copy
the digit being rounded
off and change the digits
to its right to zero.

7. If the digit being rounded off is
followed by 5, 6, 7, 8, or 9,
round up the digit.
*This means add 1 to the
digit being rounded off
and change the digits to
its right to zeros.

8. Find your number.
Look right next door.
4 or less you just ignore.
5 or up, add 1 more.
Are we done yet?
No not quite.
Add zeros to the right.
That’s how we round off.
NEAREST
TEN

9. NEARES
T TEN
NEARES
T TEN

10. nearest
5
0

11. nearest
8
0

12. nearest
10
0

13. nearest
3
0

14. nearest
2
0

15. nearest
4
0

16. nearest
4
0

17. nearest
6
0

18. nearest
9
0

19. nearest
9
0

20. nearest
8
0

21. nearest
5
0

22. nearest
3
0

23. nearest
8
0

24. nearest
3
0

25. nearest
7
0

26. nearest
3
0

27. nearest
4
0

28. Find your number.
Look right next door.
4 or less you just ignore.
5 or up, add 1 more.
Are we done yet?
No not quite.
Add zeros to the right.
That’s how we round off.
NEAREST
HUNDRED

29. NEARES
T
HUNDRE

30. nearest
10
0

31. nearest
40
0

32. nearest
50
0

33. nearest
90
0

34. nearest
8,9
00

35. nearest
1,2
00

36. nearest
8,9
00

37. nearest
9,2
00

38. nearest
60
0

39. nearest
60
0

40. nearest
3,2
00

41. nearest
7,80
0

42. nearest
1,2
00

43. nearest
50
0

44. nearest
9,9
00

45. nearest
80
0

46. nearest
80
0

47. nearest
6,3
00

48. Find your number.
Look right next door.
4 or less you just ignore.
5 or up, add 1 more.
Are we done yet?
No not quite.
Add zeros to the right.
That’s how we round off.
NEAREST
THOUSAND

49. NEAREST
THOUSAN

50. nearest
2,0
00

51. nearest
5,0
00

52. nearest
10,0
00

53. nearest
1,0
00

54. nearest
4,0
00

55. nearest
3,0
00

56. nearest
8,0
00

57. nearest
9,0
00

58. nearest
5,0
00

59. nearest
9,0
00

60. nearest
4,0
00

61. nearest
7,0
00

62. nearest
3,0
00

63. nearest
8,0
00

64. nearest
7,0
00

65. nearest
4,0
00

66. nearest
6,0
00

67. nearest
4,0
00