Question

Use algebra tiles to find the difference. Let one white tile equal +1 and one black tile equal –1. 6 – (–9) A. 15; B. 13; C. –3; D. 15;

Answer 1

I looked it up the answer is B 13

Answer 2

The correct option is A.

Explanation:

Let one white tile equal +1 and one black tile equal –1. It means the sum of one white tile and 1 black tile is 0.

We need to find the value of 6-(-9).

6 means 6 white tiles.

-9 means 9 black tiles.

-(-9) means 9. It represents 9 white tiles.

Now, we have total 15 white tiles.

6-(-9)= 6+9 = 15

The value of 6 – (–9) is 15. Therefore the correct option is A.