38x7+62x7 列数式计算 15x(20+73) 5x23+5x27
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2016-05-19 · 知道合伙人教育行家
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38x7+62x7
=(38+62)*7
=100*7
=700
15x(20+73)
=15*93
=15*(100-7)
=15*100-15*7
=1500-105
=1395
5x23+5x27
=5*(23+27)
=5*50
=250
=(38+62)*7
=100*7
=700
15x(20+73)
=15*93
=15*(100-7)
=15*100-15*7
=1500-105
=1395
5x23+5x27
=5*(23+27)
=5*50
=250
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展开全部
38x7+62x7
=(38+62)x7
=100x7
=700
15x(20+73)
=15x93
=15x(100-7)
=15x100-15x7
=1500-105
=1395
5x23+5x27
=5x(23+27)
=5x50
=250
=(38+62)x7
=100x7
=700
15x(20+73)
=15x93
=15x(100-7)
=15x100-15x7
=1500-105
=1395
5x23+5x27
=5x(23+27)
=5x50
=250
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展开全部
38x7+62x7
=(38+62)x7
=100x7
=700
=(38+62)x7
=100x7
=700
追答
15x(20+73)
=15x(90+3)
=15x90+15x3
=1350+45
=1395
5x23+5x27
=5x(23+27)
=5x50
=250
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