Question

A. Solve (-1.15) × 3.2

B. Explain how you determined the sign of your answer

Answer 1

A. (-1.15)×3.2 = -(1.15×(3 + .2))

... = -(1.15×3 + 1.15×.2) = -(3.45 + 0.23)

... = -3.68

B. There are two factors in the product, one of which is negative. The total number of negative factors is an odd number, so the product will be negative.

You can also enter the numbers with their signs into a calculator, and it will correctly calculate the sign of the product.