6.4×7.23 0.9×0.4×72.3的简便方法?
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用简便方法计算
7/9×12+6×4/9
=7/9×12+12×2/9
=(7/9+2/9)×12
=1×12
=12
7/9×12+6×4/9
=7/9×12+12×2/9
=(7/9+2/9)×12
=1×12
=12
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解:
6.4×7.23+ 0.9×0.4×72.3
=6.4×7.23+ 0.36×72.3
=6.4x7.23+3.6x7.23
=(6.4+3.6)x7.23
=10x7.23
=72.3
6.4×7.23+ 0.9×0.4×72.3
=6.4×7.23+ 0.36×72.3
=6.4x7.23+3.6x7.23
=(6.4+3.6)x7.23
=10x7.23
=72.3
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2019-12-11 · 知道合伙人教育行家
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6.4×7.23+0.9×0.4×72.3
=0.64×72.3+0.36×72.3
=(0.64+0.36)×72.3
=1×72.3
=72.3
=0.64×72.3+0.36×72.3
=(0.64+0.36)×72.3
=1×72.3
=72.3
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2019-12-11
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6.4×7.23+ 0.9x0.4×72.3
=6.4x7.23+0.36x7.23x10
=(6.4+0.36x10)x7.23
=10x7.23
=72.3
=6.4x7.23+0.36x7.23x10
=(6.4+0.36x10)x7.23
=10x7.23
=72.3
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