Open Middle®
Directions: Using the digits 1 to 9, at most one time each, place a digit in each box to make the equation true.
Hint
How can thinking about the two numbers being multiplied together help you figure out the product?
Answer
There are 58 unique answers. Three examples are:
1: 3 x (7 – 2) = 15
2: 3 x (8 – 4) = 12
3: 3 x (9 – 1) = 24
1: 3 x (7 – 2) = 15
2: 3 x (8 – 4) = 12
3: 3 x (9 – 1) = 24
Source: Owen Kaplinsky
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3 (9-4)=15
3 (8-4) = 12
9(4-2)=18
7 (9-3)=42
7 (9 – 1) = 56