This document is a mathematics online class that discusses numbers before and after other numbers. It provides examples of numbers lines showing what number comes before or after a given number. It asks questions about what number comes before or after a presented number and provides the answer. Some questions ask the student to choose the correct answer between two choices provided. The purpose is to teach students about relative positioning of numbers on a number line and the concept of numbers coming before or after other numbers.

1. BEFORE
and
AFTER
Numbers
2021 MATHEMATICS ONLINE CLASS
with Teacher Joy

2. BEFORE
NUMBERS

3. BEFORE
NUMBERS
- A number that is 1 less or
a number that appears
first to the certain number.

4. NUMBER LINE
What number
comes before 6?
before
? 6

5. NUMBER LINE
before
What number
comes before 6? 5 6

6. NUMBER LINE
Before number 6 is 5.
before

7. NUMBER LINE
What number
comes before 9?
before
? 9

8. NUMBER LINE
before
What number
comes before 9? 8 9

9. NUMBER LINE
Before number 9 is 8.
before

10. NUMBER LINE
What number
comes before 4?
before
? 4

11. NUMBER LINE
before
What number
comes before 4? 3 4

12. NUMBER LINE
Before number 4 is 3.
before

13. 30 40 50
60 70 80 90
20

14. ? 81
What number comes before 81?
before

15. 81
before
80

16. ? 56
What number comes before 56?
before

17. 56
before
55

18. ? 30
What number comes before 30?

19. 30
-1
29

20. AFTER
NUMBERS

21. AFTER
NUMBERS
- A number that is 1 more
or a number that appears
next to the certain
number.

22. NUMBER LINE
What number
comes after 4?
after
?
4

23. NUMBER LINE
What number
comes after 4?
after
5
4

24. NUMBER LINE
after
After number 4 is 5.

25. NUMBER LINE
What number
comes after 7?
after
?
7

26. NUMBER LINE
What number
comes after 7?
after
8
7

27. NUMBER LINE
after
After number 7 is 8.

28. NUMBER LINE
What number
comes after 9?
after
?
9

29. NUMBER LINE
What number
comes after 9?
after
10
9

30. NUMBER LINE
after
After number 9 is 10.

31. ?
27
What number comes after 27?
after

32. 27
after
28

33. ?
76
What number comes after 76?
after

34. 76
after
77

35. ?
49
What number comes after 49?
after

36. 49
after
50
+1

37. What comes
before?
01.
What comes
after?

38. 30 40 50
60 70 80 90
20

39. 40 41 42 … 49 50
89
88
87
…
80
79

40. ?
25
What number comes after 25?
24 26
a. b.

41. 26
25
What number comes after 25?
24 26
a. b.

43. ?
37
What number comes after 37?
38 39
a. b.

44. 38
37
What number comes after 37?
38 39
a. b.

46. ? 20
What number comes before 20?
21 19
a. b.

47. 19 20
What number comes before 20?
21 19
a. b.

49. ? 41
What number comes before 41?
50 40
a. b.

50. 40 41
What number comes before 41?
50 40
a. b.

52. ?
82
What number comes after 82?
83 81
a. b.

53. 83
82
What number comes after 82?
83 81
a. b.

55. ? 52
What number comes before 52?
53 51
a. b.

56. 51 52
What number comes before 52?
53 51
a. b.

58. ? 93
What number comes before 93?
92 94
a. b.

59. 92 93
What number comes before 93?
92 94
a. b.

61. ?
45
What number comes after 45?
47 46
a. b.

62. 46
45
What number comes after 45?
47 46
a. b.

64. ?
88
What number comes after 88?
87 89
a. b.

65. 89
88
What number comes after 88?
87 89
a. b.

67. ? 29
What number comes before 29?
18 28
a. b.

68. 28 29
What number comes before 29?
18 28
a. b.