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1、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 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+1.58 324.90.9 4.84.80.5 (1.250.125)8 4.8100.1 56.59956.5 7.0910.80.87.09 4.85 + 0.35 1.4 8.7 17.4 - 8.7 7
2、.4 12.50.42.58 0.873.16+4.64 9.5101 0.68 （5.2 -3.5） 1.25 40.5 0.81 0.18 4.8 （15 2.4） 6.81+6.8199 0.2518540 4.40.83.40.8 (9.37+937+937+937) 25 2.376.3+2.373.7 2.51.250.32 3.810.12.5(3.80.04) 7.69101 3.810.1 0.2539+0.25 0.12572 460.33+540.33(85.27) 1.25 6.81+6.8199 0.25185406.80.750.5 3.750.1252.75 1.
3、53+23.47.29.599 13.50.98 12.58.8 二、解方程：54-X=24 7X=49 126X=4213+A=28.5 2.4X=26.4 7.5x3x=1851.3-2x=5.5 24x+6x=63.6 5.6x+4.4x=5.2x3.86=5.46 17.89x=12.89 40.8x=57.3 x3.25=16 2x0.828.2 30.5x77.8x2.6 80x412 50.9x2.752x0.4x=48 62x6x=18 35x13x=9.6 0.5254x=0.6 0.7(x0.9)=42 1.3x2.43=12.4 3.5x = 140 2x +5 = 40
4、 15x+6x = 168 5x1.5 = 4.5 13.7x = 5.29 4.2 33x = 5.120.54x=8.1 3.6x1.2=9.75 181.51.7x=13.418.5x9.9x=1.721 9.2x+1.5x=32.1 7.258x=11.2计算下面各题(能简算的要简算) 7.0523.7+7.0576.3 0.1253.22.5 12.81(1.5+7.81) 8.72.6+6.48.7+8.7 102511254.53.6 12.253.10.856.17 （1.91.90.9）（3.82.8） 2.651.71.351.7 列竖式计算，得数保留一位小数。1.21.4
5、 0.378.4 3.142.80.851.12 0.865.4 0.152.344014 26.3731 45.538156035 4.82.3 1.553.97.22.1 3.877 146.4135.636.1 2.840.03 0.380.1326.3731 3242 2.840.034.823 0.3820.13 4.24.5列竖式计算 1.642.35= 8.656.31= 28.44814= 0.58250= 12.53.6= 10.8834= 107.64= 1.867= 13.886.29= 9260.15= 8500= 26.37.93= 237.06= 100.22.28
6、= 449（精确到百分位） 三、计算（能简便的用简便方法计算）82512516 404250 4555（6821555） 329932 4.8396148 345217871223 2556+4565 489101489 457+317+343+583 46564846464竖式计算： 1824= 43.6826= 25.30.88=0.15753.15= 0.6121.8= 16.7870.28 （保留一位小数）1、 算下面各题2.360.22 2.84.58 3.574.2 82.836 452.46 3.60.24 382.545 6.45.482、 简便计算3.62.5+7.53.6 2.51.2 0.12532 4.30.9 6.5102 3.2599+3.25
