Question

Suppose a seventh grader birthday is today,and she is 12 years old.how old was she 3 1/2 years ago?draw a number line

Answer 1

<--•----------◘---------•---------◘---------•---------◘---------•-----------◘-----------•--->    8          8.5         9         9.5        10        10.5       11           11.5       12

Jump back three dots (•) from 12 to 11 to 10 to 9. Those are your three years. Now we have to calculate the additional 1/2 year, right? Jump back one square (◘) from 9 to 8.5. That's your answer :) She was 8 1/2 years old.

Answer 2

She was 8.5 or 8 1/2