Subtraction with Regrouping
Addition with regrouping
Expanded Form
Unknown Numbers
10 more 10 less
Math Jokes
100

47-29

18

100

55+27

82

100

38

30+8

100

11-___=6

5

100

Ten more than 75

85

100

Why was the math book sad?

Because it had too many problems!
 

200

24-19

5

200

46+37

83

200

99

90+9

200

20-___=7

13

200

Ten less than 20

10

200

What is a butterfly's favorite subject at school?

 

Mothematics!
 

300

33-26

7

300

69+51

120

300

74

70+4

300

19-___=7

12

300

Ten more than 41

51

300

What did zero say to the number eight?

Nice Belt!

400

62-47

15

400

58+34

92

400

68

60+8

400

35-____=

20

400

Ten less than 33

23

400

How do you keep warm in a cold room?

Go to a corner.. it's 90 degrees!

500

91-59

32

500

67+28

95

500

89

80+9

500

76-____= 62

14

500

Ten more than 89

99

500

Why did the girl wear glasses during math class?

Because it improves di-vison