1、1、用竖式计算 0.3961.2= 0.7560.36= 15.613=0.1815= 0.02514= 3.0636=0.040.12 3.842.6 5.763 （保留一位小数） 7.1522= 90.753.3= 3.680.25=16.90.13= 1.553.9 = 3.70.016=13.760.8= 5.20.6 = 8.41.3 = 6.40.5= 4.480.4 = 5.255 = 35.44.2= 0.0420.54= 0.760.32= 0.250.046= 2.523.4 = 1.0825 = 0.121. 6 4.80.25 0.1251.4（保留两位小数）2.50.
2、7= 10.13.3= 0.430.28=（保留三位小数） （商用循环小数）10.7512.5= 3.259.04=（用乘法验算） （用除法验算） 0.430.28= 6.450.73= 4.60.6=8.90.05= 3.080.43= 1.526.7=5.2229= 18.723.6= 13.953.1=7.1522= 90.753.3= 3.680.25=2、脱式计算（能简算的要简算）2.57.14 16.129916.12 5.20.90.97.2899+7.28 4.3500.2 642.640.52615.715.724 (2.275 0.625)0.28 3.94+34.30.2
3、 1.2(9.62.4)4.8 8.91.14.7 2.75.43.9 3.69.85-5.46 8.053.4+7.6 6.584.50.9 2.80.5+1.58324.90.9 4.84.80.5 (1.250.125)84.8100.1 56.59956.5 7.0910.80.87.094.85 + 0.35 1.4 8.7 17.4 - 8.7 7.4 12.50.42.58 0.873.16+4.64 9.5101 0.68 （5.2 -3.5） 1.25 40.5 0.81 0.184.8 （15 2.4） 213.0.82576.81+6.8199 0.2518540 4.4
4、0.83.40.8 (9.37+937+937+937) 25 42.1.1.1.752.376.3+2.373.7 2.51.250.32 3.810.12.5(3.80.04) 7.69101 0.2539+0.250.12572 460.33+540.33 0.2518540(85.27) 1.25 6.81+6.8199 3.94+34.30.26.80.750.5 3.750.1252.75 1.53+23.47.29.599 13.50.98 12.58.8 6.81+6.8199 0.2518540 2.08(9.62.4)4.8 二、解方程：54-X=24 7X=49 5.6x
5、+4.4x=5.213+A=28.5 2.4X=26.4 7.5x3x=1851.3-2x=5.5 24x+6x=63.6 65+2X=4451.3-2x=5.5 24x+6x=63.6 14X-8X=12 20X-50=50 28+6X=88 32-22X=10 3X+5X=48 10X（5+1）=60 99X+X =100 X+3=18 X-6=12 56-2X=20 4y+2=6 x+32=76 3x+6=18 16+8x=40 2x-8=8 4x-39=29 8x-3x=105 x-65=42 x+5=7 2x+3=10 12x-9x=9 6x+18=48 56x-50x=30 5x=15 78-5x=28 32y-29=3 5x+5=15 89x-9=80 100-20x=20 55x-25x=60 76y-75=1 23y-23=23 4x-20=0 80y+20=100 53x-90=16 2x+9x=11 12y-12=24 80+5x=100 7x-8=6 65x+35=100 19y+y=40 25-5x=15 79y+y=80 42x+28x=140 3x-1=8 90y-90=90 80y-90=70 78y+2y=160 88-x=80 9-4x=1 20x=40 65y-30=100 51y-y=100 85y+1=-86 45x-50=40
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