根据35×100=3500,你能计算出35×102,35×99的积吗?
35×102
=35× +35×
=
35×99
=35× ﹣35×
= .
根据35×100=3500,你能计算出35×102,35×99的积吗?
35×102
=35× +35×
=
35×99
=35× ﹣35×
= .
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