0.32x12.5x2.5简便

鬱郝凡358112.5X0.32X0.9简便怎么算 -
汲迫注18283924318 ______ 12.5*0.32*0.9 [把0.32看成0.8*0.4的积]=12.5*0.8*0.4*0.9=10*0.4*0.9=4*0.9=3.6

鬱郝凡3581用简便方法计算12.5x0.32x1.25 -
汲迫注18283924318 ______ 12.5x0.32x1.25=12.5x(0.4x0.8)x1.25=(12.5x0.4)x(0.8x1.25)=5x1=5

鬱郝凡358112.5*0.32*0.25简便计算 -
汲迫注18283924318 ______ 12.5x0.32x0.5 =12.5x0.8x0.4x0.5 =10x0.2 =2

鬱郝凡35810.32x12.5的简便算法的原理 -
汲迫注18283924318 ______ 0.32x12.5=0.4*(0.8*12.5)=0.4*10=4

鬱郝凡3581怎样简便怎样算 0.32x25x12.5等于100对吗 -
汲迫注18283924318 ______ 解0.32x25x12.5=0.4*0.8x25x12.5=0.4x25x12.5*0.8=(0.4x25)x(12.5*0.8)=10*10=100 对

鬱郝凡358112.5*0.32*0.5 3.2*2.4+32*0.76 简便运算 -
汲迫注18283924318 ______ 12.5*0.32*0.5 =(12.5x0.08)x(4x0.5) =1x2 =2 3.2*2.4+32*0.76 =32x0.24+32x0.76 =32x(0.24+0.76) =32x1=32

鬱郝凡35811.25x3.2x12.5x0.68简便计算 -
汲迫注18283924318 ______ 1.25x3.2x12.5x0.68 =1.25x8*0.4x12.5x2*0.32 =(1.25x8)*(0.8x12.5)*0.32 =10*10*0.32 =32

鬱郝凡35812.25x1.8+12.5x0.18简便计算 -
汲迫注18283924318 ______ 2.25x1.8+12.5x0.18=2.25x1.8+1.25x1.8=1.8x(2.25+1.25)=1.8x3.5=1.8x3+1.8x0.5=5.4+0.9=6.3

鬱郝凡35813.2*12.5*2.5怎么简便运算 -
汲迫注18283924318 ______ 3.2x12.5x2.5 =4x0.8x12.5x 2.5 =(4x2.5)x(0.8x12.5) =10x10 =100

鬱郝凡35810.40[(10 - 0.40X)/0.32]+0.32X=10 - 0.56 此方程怎么解?? 要的是过程 不要一步解 -
汲迫注18283924318 ______ (0.40/0.32)(10-0.40X)+0.32X=9.441.25(10-0.40X)+0.32X=9.4412.5-0.5X+0.32x=9.4412.5-9.44=0.18x x=3.06/0.18=17