题目内容
(1)计算-9÷3+(
-
)×12+32;
(2)计算3a3b2÷a2+b•(a2b-3ab-5a2b)
| 1 |
| 2 |
| 2 |
| 3 |
(2)计算3a3b2÷a2+b•(a2b-3ab-5a2b)
(1)-9÷3+(
-
)×12+32,
=-3+(-
)×12+9,
=-3-2+9,
=4;
(2)3a3b2÷a2+b•(a2b-3ab-5a2b),
=3ab2+b(-3ab-4a2b),
=3ab2-3ab2-4a2b2,
=-4a2b2.
| 1 |
| 2 |
| 2 |
| 3 |
=-3+(-
| 1 |
| 6 |
=-3-2+9,
=4;
(2)3a3b2÷a2+b•(a2b-3ab-5a2b),
=3ab2+b(-3ab-4a2b),
=3ab2-3ab2-4a2b2,
=-4a2b2.
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