Answer:
1. 3(2+7)= 6+21
2.(5x2) x 4 = (10) x 4= 40
3. 9+5= 14
4. 4(1)= 4
5. 25+(-25)= 25-25=0
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Answer:
1. 3(2+7)= 6+21
2.(5x2) x 4 = (10) x 4= 40
3. 9+5= 14
4. 4(1)= 4
5. 25+(-25)= 25-25=0