5·7ⅹ3·26+326ⅹ0·7用脱式怎样简便计算
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5.7×3.26+326×0.7
=5.7×3.26+3.26×70
=3.26×(5.7+70)
=3.26×(5+0.7+70)
=3.26×5+3.26×0.7+3.26×70
=16.3+2.282+228.2
=18.582+228.2
=246.782
=5.7×3.26+3.26×70
=3.26×(5.7+70)
=3.26×(5+0.7+70)
=3.26×5+3.26×0.7+3.26×70
=16.3+2.282+228.2
=18.582+228.2
=246.782
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