一、列竖式计算。4.8-2.81.3+2.53.1+2.2226.2-13.112.3+11.235.82-13.33.7+2.3615.4+2.9711.65-7.3910-8.755.94+10.79.82-6.184.8×0.250.32×0.89.8×0.54.8×1.20.32×1.29.8×1.030.12×502.6×0.51.3×2.29.6×0.85.04×283.82×0.450.96×6.93.8×448×0.150.125×81.8×0.850.86×1.212×0.163.5×1.22.7+3.63.25-1.140.3×49.6-1.648×1.5762.4+7.626.7×2.43.05×1.44.8-2.81.3+2.53.1+2.2226.2-13.112.3+11.235.82-13.33.7+2.3615.4+2.9711.65-7.3910-8.755.94+10.79.82-6.184.8×0.250.32×0.89.8×0.54.8×1.20.32×1.29.8×1.030.12×502.6×0.51.3×2.29.6×0.85.04×283.82×0.450.96×6.93.8×448×0.150.125×81.8×0.850.86×1.212×0.163.5×1.22.7+3.63.25-1.140.3×49.6-1.648×1.5762.4+7.626.7×2.43.05×1.4二、脱式计算，用你喜欢的方法计算（能简便的要简便）4.6-1.75+2.087.41-(2.96+3.04)3.2+1.27-2.495-(4.19-2.83)4.28+0.53-3.371.54+2.08+3.622.8×5+7.2×52.5×13+0.92.6+1.4×30.25×3.7×0.40.89×4.8+0.89×5.21.83+3.79+0.1710-0.34-0.662.5×0.6-1.8×0.5(8+0.8)×1.25(15.4-7.8)×3.54.15+3.24+9.85+6.763.2×4.6+3.2×5.412.8+2.04×9.54.5×3.6+5.2×0.356.15×9.4-424.5×0.9+5.5×0.9(7.5+2.5)×0.252.25+1.25×0.187.8+4.56+2.20.65×6.4-0.65×5.41.3+4.7×0.95.01-1.9+4.990.4×99+0.47.5-7.5×0.8101×4.8-4.8三、解下列方程。x-19=2x-12.3=3.86x=1563x=630x-47=4759+x=120x÷52=7x÷28=03x+6=154x-2=268+x=203x+4=342x+5=552x+20=503x+20=50X+23.5=454x+9=24936+2x=48m÷0.6=0.454x=362.5+x=10x-18=403x-3.9=5.12y+7=918m÷2=24X+12=25x-19=284.5+x=19.2x-15.6=27.4x÷17=68四、、用方程表示下面的数量关系，并解答。1、比x多7.3的数是12.8。2、24除x的商是0.2。3、比x的6倍少9的数是27。4、比x多61.7的数是128。5、比x少7.8的数是10.5。6、一个数的3倍再加上6，和是157、一个数除以32的商是56，这个数是多少？8、比x少9.2的数是18.5。
