Question

Which expressions have products of -0.64? If they do not have a product of -0.64, explain a way to make them have that product.

A.(0.32)(-2)
B.1.6(-4)
C.0.64(-1)
D.(1.28)(-0.5)
E.(-4)(-0.16)

Answer 1

A, C, and D are correct

Explanation:

A. (0.32)(-2)

(0.32)(-2) = -0.64

Correct.

B. 1.6(-4)

1.6(-4) = -6.4

Wrong.

Divide by 10.

`(-6.4)/(10) = \mathbf{-0.64}`

C. 0.64(-1)

0.64(-1) = -0.64

Correct.

D. (1.28)(-0.5)

(1.28)(-0.5) = 0.64

Correct.

E. (-4)(-0.16)

(-4)(-0.16) = 0.64

Wrong.

Multiply by -1.

(0.64)(-1)= -0.64