230问答网 > 用简便方法计算：37.5×7.1＋500×0.29＋1.1×12.5

用简便方法计算：37.5×7.1＋500×0.29＋1.1×12.5

2024-12-29 07:26:48

推荐回答（5个）

回答1：

37.5×7.1＋500×0.29＋1.1×12.5
=37.5*1.1+37.5*6+500×0.29＋1.1×12.5
=(37.5+12.5)*1.1+37.5*6+500×0.29
=50*1.1+37.5*6+500×0.29
=500*0.11+37.5*6+500×0.29
=500*(0.11+0.29)+37.5*6
=500*0.4+37.5*6
=200+225
=425

回答2：

37.5×7.1＋500×0.29＋1.1×12.5
=（50-12.5）*7.1+50*2.9+1.1*12.5
=50*（7.1+2.9）-12.5*（7.1-1.1)
=500-12.5*6
=500-75
=425

回答3：

37.5×7.1＋500×0.29＋1.1×12.5
=(50-12.5)*7.1+50*2.9+1.1*12.5
=50*7.1-12.5*7.1+50*2.9+1.1*12.5
=50*(7.1+2.9)-12.5*(7.1-1.1)
=500-75=425

回答4：

37.5×7.1＋500×0.29＋1.1×12.5
=37.5*(7+0.1)+500*(0.3-0.01)+(1+0.1)*12.5
=37.5*7+37.5*0.1+500*0.3-0.01*500+12.5+0.1*12.5
=262.5+3.75+150-5+12.5+1.25
=(262.5+12.5)+150+(3.75+1.25)-5
=275+150+5-5
=425

回答5：

原式 =3x12.5X7.1+500x(0.3-0.01)+1.1x12.5
=12.5x(3*7.1+1.1)+150-5
=12.5x(8*2.8)+145
=280+145=425