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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;

1 Answer

3 votes
6 – (–9)
= 6+9
=15

answer is A. 15; and D. 15; (because both have the same answer = 15)
User Gijs De Jong
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