题目内容
计算下列各题
①(3a2b)3-(-2ab4)2÷(6a5b3)
②(
a4b7+
a3b8-
a2b6)÷(-
ab3)2.
①(3a2b)3-(-2ab4)2÷(6a5b3)
②(
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 2 |
①(3a2b)3•(-2ab4)2÷(6a5b3)
=27a6b3•4a2b8÷6a5b3
=108a8b11÷6a5b3
=18a3b8;
②(
a4b7+
a3b8-
a2b6)÷(-
ab3)2
=(
a4b7+
a3b8-
a2b6)÷(
a2b6)
=3a2b+2ab2-1.
=27a6b3•4a2b8÷6a5b3
=108a8b11÷6a5b3
=18a3b8;
②(
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 2 |
=(
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 4 |
=3a2b+2ab2-1.
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