题目内容
计算:(-
m4n3) 3÷(-
m3n2)2- (-2mn)-1.
| 2 |
| 3 |
| 1 |
| 2 |
(-
m4n3) 3÷(-
m3n2)2•(-2mn)-1,
=-
m12n9÷
m6n4•(-
m-1n-1),
=(-
÷
)m12-6n9-4•(-
m-1n-1),
=-
m6n5•(-
m-1n-1),
=(-
)×(-
)m6-1n5-1,
=
m5n4.
| 2 |
| 3 |
| 1 |
| 2 |
=-
| 8 |
| 27 |
| 1 |
| 4 |
| 1 |
| 2 |
=(-
| 8 |
| 27 |
| 1 |
| 4 |
| 1 |
| 2 |
=-
| 32 |
| 27 |
| 1 |
| 2 |
=(-
| 32 |
| 27 |
| 1 |
| 2 |
=
| 16 |
| 27 |
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