265乘以[-1.25]
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/08 05:51:51
33乘以1.03简便计算=33x1+33x0.03=33+0.99=33.99(1.25加1.25加1.25)乘以5加8.75乘以15简便计算.=1.25x3x5+8.75x15=1.25x15+8.
33乘以1.03=33*(1+0.03)=33*1+33*0.03=33+0.99=33.99(1.25+1.25+1.25)*5+8.75*15=3.75*5+8.75*(10+5)=18.75+8
1.25乘以0.98乘以0.8=1.25乘以0.8乘以0.98=1乘以0.98=0.98
1.25×320×25=1.25×80×4×25=100×100=100006.89×101-6.89=6.89×(101-1)=6.89×100=68916×0.25×1.25=8×1.25×(2×
-1.25*31*-0.1=-0.1-0.1*31=-3.1
0.25*1.25*32=0.25*4*1.25*8=1*10=10
1.25乘以0.8乘以4乘以2.5=(1.25×0.8)×(4×2.5)=1×10=10
0.3
48×0.25×1.25=(40+8)×0.25×1.25=40×0.25×1.25+8×0.25×1.25=12.5+2.5=15
0.25乘以3.2乘以1.25=0.25x3.2x1.25=1/4x4x0.8x1.25=1x1=1
4.02*35=(4+0.02)*35=4*35+0.02*35=140+0.7=140.748*0.25=40*0.25*8*0.25=10+2=128.9*9+8.9=8.9*(9+1)=89
(6.52*12.5)*(9.8-1.8)8*1.25*65.210*65.2再问:可是应该的658.075呀能不能快点回答呀我很急的再答:(9.8*62.5*1.25)—-(12.5*0.625*1
注意到1.25*8=101.25*0.8=1那么3.2*1.25+4.8*12.5=4*0.8*1.25+6*0.8*12.5=4+6*10=64
1.2*1.25-0.2*1.25=1.25*(1.2-0.2)=1.25*1=1.25
原式=(1.25×8)×(0.25×40)=10×10=100
48x(1/4)x(5/4)分母都约去,只剩下分子相乘就是了!
1.25乘以三分之二乘以0.8=1.25×0.8×2/3=1×2/3=2/3
1.25*2.5*3=1.25*2.5*4*8=(4*2.5)*(8*1.25)=10*10=100
(1.25乘以2.7乘以5.7)/(8.1乘以0.25乘以1.9)上下各乘以10000:=(125*27*57)/(81*25*19)上下各除以25:=(5*27*57)/(81*19)再各除以27: