题目内容
99
×25.
99 |
105 |
99
×25,
=(100-
)×25,
=100×25-
×25,
=2500-
,
=2498
.
99 |
105 |
=(100-
6 |
105 |
=100×25-
6 |
105 |
=2500-
10 |
7 |
=2498
4 |
7 |
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题目内容
99 |
105 |
99 |
105 |
6 |
105 |
6 |
105 |
10 |
7 |
4 |
7 |