Question

Mary lives 3.5 blocks from the library. She leaves the library and walks 3.5 before she relizes that she is walking the wrong way. After walking 3.5 blocks back, a how ofar does mary have to walk?

Answer 1

Answer:3.5 blocks

Explanation:

She started at her house which is 0 and is 3.5 blocks away from the library. She goes 3.5 blocks backwards from 0. Then she walks 3.5 blocks back to 0. Therefore she has to walk 3.5 blocks over again.