Directions: Use only the digits 1 to 7, at most one time each, fill in the boxes to create a true equation.

### Hint

### Hint

What place value would you like to start with? What digits “go” together?

### Answer

### Answer

Number of Unique Solutions: 20 (40 with commutative property)

1: 43 = 16 + 27

2: 43 = 17 + 26

3: 47 = 32 + 15

4: 47 = 35 + 12

5: 57 = 21 + 36

6: 57 = 31 + 26

7: 61 = 34 + 27

8: 61 = 37 + 24

9: 62 = 15 + 47

10: 62 = 45 + 17

11: 67 = 14 + 53

12: 67 = 54 + 13

13: 71 = 25 + 46

14: 71 = 26 + 45

15: 74 = 23 + 51

16: 74 = 53 + 21

17: 75 = 12 + 63

18: 75 = 13 + 62

19: 76 = 41 + 35

20: 76 = 45 + 31

Source: Eric Appleton

62=59+43

50=40+10

90=14+76

90=67=23

90=34+56

90=27+63

76=52+24

15=7+8

76=35+41

97=76+21

94=74+20

45=35+10

74=39+45

76=35+41

97=76+21

94=74+20

45=35+10

74=39+45

43=17+25

57=21+36

74=21+53

67=13+54

100=10+90