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64.2*87+0.642*1300的简便运算怎么做啊?
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64.2*87+0.642*1300的简便运算怎么做啊?
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答案和解析
64.2*87+0.642*1300
=64.2*87+64.2*13
=64.2*(87+13)
=64.2*100
=6420
=64.2*87+64.2*13
=64.2*(87+13)
=64.2*100
=6420
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