Question

Each brick is 3 1/4 inches tall if martina makes a stack of 4 bricks how much inches tall will it be

Answer 1

You can multiply 3 x 4 which is 12 and then 1/4 x 4 which is 1.
12+1=13

13 inches tall

Answer 2

13 inches

Explanation:

Convert to improper fraction and multiply

13/4 x 4/1 (4's cancel out)

13