五年级数学简便计算练习题.doc

五年级数学简便计算练习题5.327.934.68 2.50.390.4 32.18.31.7 12.39(5.182.39) (252.50.25)4 1.83.52.51.8 12.58.8 3.61.23.61.22 6.83.62.6864 1.3112.582 1.25320.25 3.80.99 简便计算(2)4.699+4.6 7.5101-7.51.252.5（804） 4.647+4.654-4.6 7.682.50.4 0.4572+450.18+4.5 5.599 0.12572 12.50.42.58 9.51014.27.8+2.24.2 0.873.36+4.640.87简便计算(3)4.080.25 4900.355.2899 12.54.120.85.710.1 490.12580.4632.5 0.57.6200.34101 4.8699 4.9101 8.75 11-8.75 9.9 212 0.68101简便计算(4)3.26 5.7-3.260.7 55.699+55.61.25 2130.8 6.13.6+3.63.94.7599+4.75 2.73991.22.5+0.82.5 1010.450.254.784 0.652027.28.4+2.88.4 0.78984.80.25 1.5105 0.32.50.4简便计算(5)561.25 1.25+4.6+0.75 1.67.51.25490.1258 0.4632.5 0.57.6209.6100.1 4210.2 9.80.5228.499+28.4 0.942.5-0.92.540.812.52.5 3.61010.12572 0.2539+0.25简便计算(6)3.20.82+3.21.18 1.5899+1.58100.22.5 14.5102 1.253.20.2512.15-3.83+0.85-6.17 2.651.7+1.351.73.550.43.550.4 0.1250.388018.6-18.60.5 3.583.6+6.43.583.050.254 4.250.44.250.4解方程（1）20-X=9 X-1.8=4 15-X=22.1X=3 X 7=0.3 1.6X=6.46X-35=13 3X-126=6 (5X-12) 8=24(100-3X) 2=8 6X+3=9 4X-2=10 5X-39=56 18+5X=21 8X-414=07X3=8.19 43-X=38 6.3X=7解方程（2）7(X-20)=140 6.7X-60.3=6.7 9X+X=04(6X+3)=60 2X+234=134 (3X-4) 5=4 2X+1.5X=17.5 8X-3X=105 3X+X+6=263X+6=18 2X-7.5=8.5 16+8X=404X-39=29 2(X-2.6)=8 5(X+1.5)=17.58(X-6.2)=41.6 (X-3) 2=7.5 13.2X+9X=33.3解方程（3）8X-3X=105 5.4X+X=12.8 X-0.36X=16X+4.8=7.2 X-6.5=3.2 X8=0.46X+18=48 3(X+2.1)=10.5 12X-9X=8.73.8+X=6.3 X-7.9=2.6 2.5X=14X3=1.2 3.4X-48=26.8 2X-97=34.242X+25X=134 13(X+5)=169 5X+7=42解方程（4）X4.2=2 3.6X-X=3.25 2(X-3)=5.8X1.44=0.4 3.85+1.5X=6.1 6X-0.9=4.57.8X+2.4X=20.4 2(X+1)=6 6(X-1.5)=154X-123=100 (X-5) 3=7 X-0.28X=3.60.34-2X=0.2 4(X+6)=36 X-0.8X=1.26X-2X=20 0.5+7X=18 3X-68=0解方程（5）8X+19=51 2.7X-14=21.1 X-0.38X=1.245.3X-2X=1.32 4(X+4.5)=20 5X-7.3=7.73.6X+8.5=22.9 7X+4 3.5=24.5 5X+28=486X-12=30 45-3X=24 54-X=24 7X=49 126X=42 3.5-X=2.51.8 X=2 9X=927 19.4-X=7列方程并求方程的解1.X的7倍比52多25. 2.X的9倍减去5，等于49.3.X加上26等于54. 4.X与5的积是85.5.X与2.3的差是4.7. 6.X除以12等于