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Mathematics, 13.11.2020 14:30 Camobarbie2367

5. Using commutativity and associativity of addition of rational numbers, express each of the following as a rational number.
1. 2/5 +7/3+-4/5 +-1/3
2. 3/7+-4/9+-11 /7 +7/9
3. 2/5+8/3+-11 /15+4/5+-2/3
4. 4/7+0+-8/9-13/7+17/21

So important please tell me fast.

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5. Using commutativity and associativity of addition of rational numbers, express each of the follo...
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