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Student Instructions
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Work hard to solve this puzzle. If you need a hint, go to page 2 and delete the rectangle. Then go back and work to solve! You may want to use the 
tools to write to solve this!
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Teacher Notes (not visible to students)
From Open Middle: https://www.openmiddle.com/create-an-equation/ 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
