简便计算.0.46*0.4*2.5= 8.4*0.26+1.27= 0.98*42= 4.5*2.7+4.5*5.3= 1.82*1.25+1.8*0.125 =

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简便计算.0.46*0.4*2.5= 8.4*0.26+1.27= 0.98*42= 4.5*2.7+4.5*5.3= 1.82*1.25+1.8*0.125 =
简便计算.0.46*0.4*2.5= 8.4*0.26+1.27= 0.98*42= 4.5*2.7+4.5*5.3= 1.82*1.25+1.8*0.125 =

简便计算.0.46*0.4*2.5= 8.4*0.26+1.27= 0.98*42= 4.5*2.7+4.5*5.3= 1.82*1.25+1.8*0.125 =
0.46*0.4*2.5= 0.46*(0.4*2.5)=0.46*1=0.46
8.4*0.26+1.27= 8.4(0.25+0.01)+1.27=8.4*0.25+8.4*0.01+1.27=2.1*4*0.25+0.084+1.27
=2.1+0.084+1.27=3.454
0.98*42= (1-0.02)*42=42-0.84=41.16
4.5*2.7+4.5*5.3=4.5*(2.7+5.3)=4.5*8=36
1.82*1.25+1.8*0.125 =1.82*1.25+0.18*1.25=1.25*(1.82+0.18)=1.25*2=2.5

0.46*0.4*2.5= 0.46*(0.4*2.5)=0.46*1=0.46
8.4*0.26+1.27= 2.184+1.27=3.454(没弄懂简便算法）
0.98*42=(1-0.02)*42=42-0.84=41.16
4.5*2.7+4.5*5.3= =4.5*(2.7+5.3)=4.5*8=36
1.82*1.25+1.8*0.125 =1.25*(1.82+0.18)=1.25*2=2.5

12.5*0.4*2.5*8怎么简便计算? 12.5*0.4*2.5*8怎么简便计算? 1.25*（0.4+8）*2.5 简便计算.谁先答,1.25*（0.4+8）*2.5简便计算.谁先答, 2.3/0.46/2.5简便计算 2.5*3.79*0.4 简便计算 2.5×0.9×0.4简便计算 简便计算：2.5*7.2= 0.4乘1.25乘8乘2.5的简便计算 1000/0.4/1.25/8/2.5用简便方式计算 0.4*63*2.5简便计算要脱式计算哦 还有一题 12.5*8.8 简便计算 0.39/0.4/2.5*1.61简便方法计算 63.4÷2.5÷0.4简便计算 （2.5-0.25）*0.4如何简便计算? 8/(31.25*0.4)+99.36 简便计算 4．8/(2.3×0.4)简便计算 8/38*5.7+2.5/3 简便计算 10.75+0.4-9.86=? 简便计算 简便计算:10.75+0.4-9.473=()