Question

Ming made a triangular picture frame out of cardboard. The sides of the frame are 6.75 in., 6.75 in., and 8.375 in. Ming uses the addition below to determine the amount of string she needs to decorate the edges of the frame.

675 + 675 + 8.375 = 9.725. The 675 values are lined up with the 375 portion of 8.375.

Which explains Ming’s error?

Answer 1

The answer is A

Explanation:

I took the test

Answer 2

She should have included the decimal in 6.75 and aligned the decimal points to add 6.750 + 6.750 + 8.375 = 21.875.

Explanation:

6.750

6.750

+ 8.375

21.875

I hope this helps