题目内容
计算:(
)
×(
)-
×(
)
.
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| 25 |
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| 2 |
原式=(
×
×
)
=(
)
=
.
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| 5 |
| 5 |
| 3 |
| 3 |
| 25 |
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| 2 |
=(
| 1 |
| 25 |
| 1 |
| 2 |
=
| 1 |
| 5 |
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