6.3+13.7✖️2.1简便方法?
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6.3+13.7×2.1
=2.1×3+13.7×2.1
=(3+13.7)×(2+0.1)
=16.7×2+16.7×0.1
=33.4+1.67
=35.07
=2.1×3+13.7×2.1
=(3+13.7)×(2+0.1)
=16.7×2+16.7×0.1
=33.4+1.67
=35.07
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2022-08-11
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6.3+13.7✖️2.1简便方法?
6.3+13.7✖️2.1
=6.3+13.7x2+1.37
=7.67+27.4
=35.07
6.3+13.7✖️2.1
=6.3+13.7x2+1.37
=7.67+27.4
=35.07
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6.3+13.7x2.1
=2.1x3+13.7x2.1
=2.1x(3+13.7)
=2.1x16.7
=35.07
=2.1x3+13.7x2.1
=2.1x(3+13.7)
=2.1x16.7
=35.07
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