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

2 answers:

5 0

<--•----------◘---------•---------◘---------•---------◘---------•-----------◘-----------•---> 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.

sleet_krkn [62]3 years ago

3 0

She was 8.5 or 8 1/2

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