口算32-0.4=650-13=4.8-16=7.6-4=列竖式计算12.8x42=0.19x40=5.4x1.07=1.64-4=0.082x0.14=2.19-0.3=5.88-0.56=2.7-7.5=保留一名小数48-2.3=1.55-3.8=7.09-0.52=8.84-1.7=5.45-1.23=2.07-0.23-0.4521.36-0.8-12.9计算下面各题0.75x18-0.15口算2.07-0.23-0.4521.36-0.8-12.91.55-3.9=3.81-7=246.4-13=5.63-6.1=x+3.2=4.6x-1.8=415-x=2保留两位小数解下列方程0.45x0.6=2.4x6.2=2.6x1.08=28.6-11=3.64-52=1.35-15=43.5-29 二1.25x0.7x0.8计算下面各题，你以为如何简便就如何算54.9x0.384.05+37.859.8x256.1x3.6+3.6x3.92.96x40x-1.5=4x-6=7.65x=1.53x-12x6=6口算4.4-4=0.72-0.9=0.2x0.26=3.6x0.3=3m8=1.32x3=12.5x8=5.6-1.4=2.4x5=3.25x0=0.78-6=5.5-11=解下列方程1.6x=6.4x-7=0.32.1-x=36x-35=13(5x-12)x8=24简算56x1.250.8x0.25x0.4x12.51.25+4.6+0.750.06x1.7=1.36x0.05=2.3^0.46=0.072x0.15 二 0.58x0.08=0.18x8.45=0.072x0.15 二 0.58x0.08=0.18x8.45=86-16=1.26-28=0.416-32 二8.54x3.5=0.097x0.3=3.2x0.24=6.5-13=8.4-0.07=5.85-5=1.04x6=1.47-0.7=0.3x0.07=0.45x0.4=9.6-0.32=9.63-0.3=0.06-15=9-1.5=1.6x0,05=列竖式计算14.21-7=25.5-6=6.3-14=0.072x0.15 二 0.58x0.08=0.18x8.45=7xm3=8.19x+0.3=1.83+x=5.42x+1.5x=17.58x-3x=1053x+x+6=268(x-6.2)=41.6(x-3)m2=7.53(2x-4)=92x+1.5x=17.58x-3x=1053x+x+6=268(x-6.2)=41.6(x-3)m2=7.53(2x-4)=9(3X-7)-5=162(x-3)=5.83.6x-x=3.254.8x0.9+0.4874x0.28+2.6x2.8(3X-7)-5=162(x-3)=5.83.6x-x=3.254.8x0.9+0.4874x0.28+2.6x2.8
