题目内容
计算:3a+2a=______;3a•2a=______;3a÷2a=______;a3•a2=______;
a3÷a2=______;(-3ab2)2=______.
a3÷a2=______;(-3ab2)2=______.
3a+2a=5a;
3a•2a=6a2;
3a÷2a=1.5;
a3•a2=a5;
a3÷a2=a;
(-3ab2)2=9a2b4.
3a•2a=6a2;
3a÷2a=1.5;
a3•a2=a5;
a3÷a2=a;
(-3ab2)2=9a2b4.
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