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3.8×5.25+14.5×0.2简便方法

3.8x5.25+14.5x0.2=(4-0.2)x(5+0.25)+(14+0.5)x0.2=(20-1+1-0.05)+(2.8+0.1)=20-0.05+2.9=22.85

3.8*5.25+14.5*0.2=(4-0.2)*(5+0.25)+(15-0.5)*0.2=4*5+4*0.25-0.2*5-0.2*0.25+15*0.2-0.5*0.2=20+1-1-0.05+3-0.1=23-0.15=22.85请参考

3.8x5.25 +14.5x0.2=19.95+2.9=22.85 没有简算,直接计算

3.8*5.28+14.5*0.2=20.064+2.9=22.964 此题直接算即可,没有简便方法再看看别人怎么说的.

答案是22.85

3.8*(3.8+40.5*0.2)=3.8*(3.8+8.1)=3.8*11.9=3.8*(12-0.1)=3.8*12-3.8*0.1=(4-0.2)*12-0.38=48-2.4-0.38=45.6-0.38=45.22

3.8/(3.8*5)=3.8/3.8/5=1/5=0.2结果为1/5

简便计算14.5一(3.8十5.5)=14.5-5.5-3.8=9-3.8=5.2

3.8x6.5x10.2=24.7x10.2=251.94

3.8*(10+0.2)=3.8x10+3.8x0.2=38+0.76=38.76希望能帮到你

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