“未來之星”國慶長假五學(xué)年級數(shù)學(xué)計(jì)算練習(xí)

1、“未來之星”國慶長假五年級數(shù)學(xué)計(jì)算練習(xí)姓名：得分:一、豎式：13.5 X 4.50.108X2.50.54X31.24.7 X2101.38X0.5412.6X8.920.3 X 0.323.12X2.54.37X2.88.2 X40.30.208X243.6X 1.374.06 X 2.3460X2.33.05X5.66.24 X 0.784.6X5.893.53X5.6（保留三位小數(shù)學(xué)）（保留二位小數(shù)學(xué)）（保留整數(shù)）、簡便計(jì)算1.加法父換結(jié)合律：4.8 +2.5 + 17.55.78+ 1.43 +0.22 +0.571.28 +89+ 0.723.57+ 288+ 1.431.29 +2

2、3.5 + 1.71 +16.53.78+ 5.27+0.731.67 +28.9 +0.330.58+ 0.39 + 1.42 +2.611.25 +0.75 +3.21.75+ 0.34 + 1.25 +3.661.63 +3.2 + 1.37 +26.88.22+ 19.7+0.7815.3+0.38 + 1.621.58+ 3.95 + 1.052.5 X 1.25X3.2(1.5 X2.5) X43.8 X0.25 X43.5X 0.2X5(6X2.5) X 0.4(1.25 X 5) X 0.80.25 X 1.7 X 4(0.25 X 1.25) X (8X4)38X0.125

3、X8X30.5X 2.89X21.25 X5X8X0.2X 8X0.12512.5 X 3.22.4X12.50.125X5.61.25 X 7.21.25X 1.68X1.251.25 X6.40.25X3.62.5X3.20.25 X 1.62.5X2.42.5X2.83.4 X7.2 +3.4 X 2.87X 0.48 +7X0.523.5 X 0.37 +6.5 X0.378.5X8.2+8.2 X 1.50.25 X 97+0.25X30.76X2.5 +2.5 X0.241.6 X 1.7 + 1.6 X 2.32.7 X3.6 +2.7 X 6.40.73 X 3.6 + 3.6

4、 X 0.270.64 X 2.3 + 0.36 X 2.30.57 X3.5 +0.43 X3.51.82X7.2-7.2 X0.824.6 X4.6 +4.6 x 5.43.1 x 69+31X3.13.4 x 1.33.4 X0.35.乘法分配律（二）：0.38 X 99+0.387.5X 399 +7.51.02 X 99+1.023.9+ 9X3.999 X1.28 + 1.282.7+ 99X2.71.25 X (8+80 )(80+ 4) X2.5X (1.25+9)(20+4) X 2.53.2X (200 + 3)(1.25 + 17) X 8(100 + 2) X 0.99

5、10.2X (1001)2.5 x(40+4)(2.5 + 100) X40. 99X (100+1)(1.25 +40) X 8(1.25 +2.5 ) X 89.9X (100 + 7)8X(1.25 +7)4.6 X 10.24.8X10.19.9X4.610.2 X4.210.3X3.110.7X1.61.08 X 1.51.25X8.82.5X4.13.02 X4.38.8X10.210.2X9.93.9 X10.14.8乂 10.120.1X2.4I古今名言敏而好學(xué)，不恥下問 一一孔子業(yè)精于勤，荒于嬉；行成于思，毀于隨一一韓愈興于詩，立于禮，成于樂 一一孔子己所不欲，勿施于人一一孔

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