Show:
Addition within 10
Addition within 20
2 Digit Addition without Regrouping
2 Digit Addition with Regrouping
2 Digit Subtraction without Regrouping
100

3 + 2

5

100

7 + 6

13

100

32 + 41

73

100

49 + 26

75

100

56 - 43

13

200

3 + 3

6

200

8 +8

16

200

64 + 23 

87

200

71 + 19

90

200

45 - 13

32

300

8 + 1

9

300

6 + 9

15

300

22 + 22

44

300

66 + 23

91

300

99 - 64

35

400

6 + 4

10

400

7 + 8

15

400

75 + 23

98

400

53 + 57

110

400

95 - 32

63

500

3 + 6

9

500

10 + 10

20

500

44 + 25

69

500

45 + 58

103

500

76 - 25

51