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2.5 13.6 0.9简便运算

2.5*13+0.9=2.5*12+2.5+0.9=2.5*4*3+3.4=10*3+3.4=30+3.4=33.4

2.5*13+0.9的简便算法2.5*13+0.9=32.5+0.9=33.4 直接计算

2.5*13+0.9 =32.5+0.9 =33.4 你好,本题已解答,如果满意 请点右上角“采纳答案”.

2.513 0.9=3.413

2.5*13+0.9=25*1.3+0.9=25*(1+0.3)+(1-0.1)=25+7.5+1-0.1=33.4

2.5*13+0.9=2.5*(10+3)+(1-0.1)=2.5*10+2.5*3+1-0.1=25+7.5+1-0.1=22.5+1-0.1=23.5-0.1=23.4

2.5X13+0.9 =2.5X(10+3)+0.9 =25+7.5+0.9 =25+8.4 =33.4

22-2*7+0.4*7=10.8

=2.520.90.2=50.18=0.9

2.5x3.7+0.9=2.5x4-2.5x0.3+0.9=10-0.75+0.9=10+0.15=10.15

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