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37x24 74x38的简便计算

74x36+37x38=37*2*36+37*38=37*72+37*38=37*(72+38)=37*110=4070

37x24十74x38=37*2*12+74*38=74*12+74*38=74*(12+38)=74*50=3700

37x24+37x15+61x37=37x(24+15+61)=37x100=3700

36/3736/37*38=36/37*(37+1)=36/37*37+36/37*1=36+36/37=36又36/37

=262+38+37=300+37=337

78x37十24x37=(78+24)x37=(100+2)x37=100x37+2x37=3700+74=3774

40-39+38-37+……+24-23+22-21=(40-39)+(38-37)+……+(24-23)+(22-21)=1+1+……+1+1=10

18x37+ 74x41=18x37+37x2x41=(18+82)x37=100x37=3700

原式=(62÷62)*(3*3)=1*9=9

=37*(125-24-1) =37*100 =3700

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