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1

2 + 3 = 5, 

so 5-3 = ____

2

1

12 + 11=

33

1

28 + 16 =

44

1

12 + 24 + 13 =

49

1

1 + 2 + 3 + 4=

10

2

8 - 6= 2,         

so 6 + ___ = 8

2

2

25 + 31 =

56

2

18 + 52 =

70

2

27 + 34 + 8 =

69

2

2 + 8 + 4 + 3=

17

3

9 + 6 = 15,

so 6 + ____= 15

9

3

73 + 14 =

87

3

57 + 36 =

93

3

30 + 25 + 37 =

92

3

5 + 2 + 5 + 8=

20

4

13 + 7 = 20,

so 20 - 7= ___

13

4

34 + 42 = 

76

4

68 + 29 =

97

4

45 + 7 + 36 =

88

4

6 + 6 + 5 + 7=

24

5

11 - 5 = 6,

so ____ + 6 = 11

5

5

60 + 28 =

88

5

68 + 53 =

121

5

45 + 29 + 26 =

100

5

8 + 3 + 9 + 8=

28