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79×5/74用简便计算..................

=(74+5)✘5/74 =74✘5/74+5✘5/74 =5+25/74 =5又25/74

75乘74分之5 =(74+1)乘74分之5 =5+74分之5 =5又74分之5

25x5+74x5+5 =5x(25+74+1) =5x100 =500

用简便方式计算40×74乘五 40×74乘五 =74*(40*5) =74*200 =14800

74×七十五分之四十四(简便计算) 74×七十五分之四十四 =44/75*(75-1) =44/75*75-44/75*1 =44-44/75 =43又31/75

除不尽

答:5.74x99+5.74 =5.74*(99+1) =5.74*100 =574

这是个移火柴题目吧,7上的一横移到3左边,使3变成9,等式变成9+5=14

①26×5+74×5+5 =(26+74)×5+5=500+5=505②6.74+12.62+24.38+3.26=(6.74+3.26)+(12.62+24.38)=10+37=47③0.89×4.8+5.2×0.89 =0.89×(4.8+5.2)=0.89×10=8.9④0.4×99+0.4 =0.4×(99+1)=0.4×100=40⑤34.5-(17.2+4.5)=34.5-4.5-17.2=30-17.2=12.8...

5.74x0.25=5.74*1/4=5.74除以4=1.435

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