Question

The after school craft center has 15 boxes of 64 crayons each. In 12 of the boxes , 28 of the crayons have not been used. All the rest have been used how many of the crayons in the center have been used?

Answer 1

The correct answer is:

624 crayons.

Explanation:

In 12 of the boxes, 28 crayons have not been used; this leaves 64-28=36 crayons that have been used. 12(36) = 432 crayons have been used in these boxes.

3 full boxes have been used; this is 3(64) = 192 crayons.

Together this makes 432+192 = 624 crayons that have been used.

Answer 2

12 boxes of 28 crayons have been used 
so 28x12=336
336 crayons have been used
Hope this helped! :))