3.33×9.9+9.9×6.7怎么简便运算?
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简便运算先观察原式,能不能通过拆分和拼凑变成好计算的
观察原式发现,3.33和6.7可以进行凑整
故,简便计算方法如下:
=9.9×(3.33+6.7)
=9.9×10.03
=9.9×(10+0.03)
=9.9×10+9.9×0.03
=99+(10-0.1)×0.03
=99+10×0.03-0.1×0.03
=99+0.3-0.003
=99+0.297
=99.297
观察原式发现,3.33和6.7可以进行凑整
故,简便计算方法如下:
=9.9×(3.33+6.7)
=9.9×10.03
=9.9×(10+0.03)
=9.9×10+9.9×0.03
=99+(10-0.1)×0.03
=99+10×0.03-0.1×0.03
=99+0.3-0.003
=99+0.297
=99.297
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2021-06-14 · 知道合伙人数码行家
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3.33×9.9+9.9×6.7怎么简便运算?可以这样做:
3.33×9.9+9.9×6.7
=9.9X(3.33+6.7)
=10.01x9.9
=99,297
3.33×9.9+9.9×6.7
=9.9X(3.33+6.7)
=10.01x9.9
=99,297
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简便计算方法如下:
=9.9×(3.33+6.7)
=9.9×10.03
=9.9×(10+0.03)
=9.9×10+9.9×0.03
=99+(10-0.1)×0.03
=99+10×0.03-0.1×0.03
=99+0.3-0.003
=99+0.297
=99.297
=9.9×(3.33+6.7)
=9.9×10.03
=9.9×(10+0.03)
=9.9×10+9.9×0.03
=99+(10-0.1)×0.03
=99+10×0.03-0.1×0.03
=99+0.3-0.003
=99+0.297
=99.297
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评论
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你对这个回答的评价是?
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