问题 填空题

计算:3a+2a=______;3a•2a=______;3a÷2a=______;a3•a2=______;

a3÷a2=______;(-3ab22=______.

答案

3a+2a=5a;

3a•2a=6a2

3a÷2a=1.5;

a3•a2=a5

a3÷a2=a;

(-3ab22=9a2b4

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