Open Middle®
Directions: Using the integers -9 to 9 at most one time each, place an integer in each box to make the greatest possible product.
Hint
What integers would give you the greatest product? When is a time where multiplying with a negative integer might give you a greater product?
Answer
The greatest possible product is 9 · -9 · -8
Source: Robert Kaplinsky in Open Middle Math
9 times -9 times 8 = 648
The answer is 9x-9x-8
9 X -9 X -8
The answer to the question above is 9x-9x-8
9 x (-9) x (-8) = 648