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Create an Equation

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

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10 comments

  1. 50=40+10

  2. 90=14+76

    90=67=23

    90=34+56

    90=27+63

  3. 76=52+24

  4. 76=35+41
    97=76+21
    94=74+20
    45=35+10
    74=39+45

  5. 76=35+41
    97=76+21
    94=74+20
    45=35+10
    74=39+45

  6. 43=17+25
    57=21+36
    74=21+53

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