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用简便方法计算.329×10154×98+46×9898×125.
题目详情
用简便方法计算. 329×101 | 54×98+46×98 | 98×125. |
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答案和解析
(1)329×101,
=329×100+329×1,
=32900+329,
=33229;
(2)54×98+46×98,
=(54+46)×98,
=100×98,
=9800;
(3)98×125.
=(100-2)×125,
=100×125-2×125,
=12500-250,
=12250.
=329×100+329×1,
=32900+329,
=33229;
(2)54×98+46×98,
=(54+46)×98,
=100×98,
=9800;
(3)98×125.
=(100-2)×125,
=100×125-2×125,
=12500-250,
=12250.
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