Question

Which of the following equations is true?

A. 8.9(50.9 - 18.7) = 59.8 - 27.6
B. 8.9(50.9 - 18.7) = (8.9 x 50.9) - (8.9 x 18.7)
c.
8.9(50.9 - 18.7) = 8.9 - 8.9 x 18.7
D.
8.9(50.9 - 18.7) = (8.9 x 50.9) + (8.9 x 18.7)

Answer 1

B. 8.9(50.9 - 18.7) = (8.9 x 50.9) - (8.9 x 18.7)

Explanation:

If you really don't recognize the pattern of the distributive property, your calculator can tell you if the left-side expression has the same value as the right-side expression.

You are supposed to see the pattern ...

a(b -c) = ab -ac

where a=8.9, b=50.9, c=18.7. Choice B on this list is appropriate.

8.9(50.9 -18.7) = 8.9×50.9 -8.9×18.7