37×0.73 3.7×6.5-13.8×2.7如何用简便方法?
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原式
=37x0.73+3.7x6.5-13.8x2.7
=3.7x7.3+3.7x6.5-13.8x2.7
=3.7x(7.3+6.5)-13.8x2.7
=3.7x13.8-13.8x2.7
=(3.7-2.7)x13.8
=1x13.8
=13.8
供参考。
=37x0.73+3.7x6.5-13.8x2.7
=3.7x7.3+3.7x6.5-13.8x2.7
=3.7x(7.3+6.5)-13.8x2.7
=3.7x13.8-13.8x2.7
=(3.7-2.7)x13.8
=1x13.8
=13.8
供参考。
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