Posted by **avonia** on Tuesday, May 22, 2012 at 7:33pm.

i have to write a number in the block to make this true how do i get the answer for 70-30=40- please show me a example so i can complete my work

- algebra -
**Ms. Sue**, Tuesday, May 22, 2012 at 7:37pm
70-30=40-0

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