4.32×7.3+0.27×42.3简便计算?
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4.32×7.3+0.27×42.3
=432×73×0.001+423×27×0.001
=432×0.001×(73+27)
=432×0.001×100
=43.2
=432×73×0.001+423×27×0.001
=432×0.001×(73+27)
=432×0.001×100
=43.2
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如果42.3改为43.2
4.32×7.3+0.27×43.2
=4.32×7.3+0.27×10×4.32
=4.32×7.3+2.7×4.32
=4.32×(7.3+2.7)
=4.32×10=43.2
4.32×7.3+0.27×43.2
=4.32×7.3+0.27×10×4.32
=4.32×7.3+2.7×4.32
=4.32×(7.3+2.7)
=4.32×10=43.2
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4.32×7.3+0.27×42.3
=4.23×(7.3+2.7)
=4.23×10
=42.3
=4.23×(7.3+2.7)
=4.23×10
=42.3
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这道题可能抄错题目了。
应该是:
4.23×7.3+0.27×42.3
=4.23×7.3+2.7×4.23
=4.23×(7.3+2.7)
=4.23×10
=42.3
应该是:
4.23×7.3+0.27×42.3
=4.23×7.3+2.7×4.23
=4.23×(7.3+2.7)
=4.23×10
=42.3
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4.32×7.3+0.27×42.3
=31.536+42.957
=74.493
=31.536+42.957
=74.493
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