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1、精選范本小數(shù)乘除法計(jì)算題85.44-230.4-16642.84-7101.7-967.5-155.346.1211.34.538.421.24-3639.6-240.736-2343.5-1235.21-70.590.0323.6255.031.656.21-0.030.756-0.18210-1.451.3-0.2791.2-3.8207150190244.20.66-0.311.97-1.515-0.0669.6-2.938.4-0.82.27.982.4482509.99X0.025.6X2.93.77X1.80.02X965.22X0.316.246.7861.921.5660.19

2、984.67X0.95X2.441.666X6.19.432X0.002精選范本9.77X0.022.5X0.8856.78X8(循環(huán)小數(shù)的用簡便方法,除不盡保留2位小數(shù)):5.6X6.54.20312.210.16260.01886436.44.88X2.95.61X4.38.9X2.45.5X5514.15224.12321.36302.50.19541.384X5.18.78X832.6X614.268X1.70.059X0.27.0584728.74158.60.01187.255657X5.79.46X2.8517.8X6.41.5X4.9324.926.961113.927.352

3、.25.555X5.22.22X3.337.658X8536.02X0.328.8867.3926650.9310.806454.244.67X0.95X2.441.666X6.19.432X0.002精選范本8.2-0.120.8-0.976.4-5.41.25-1.24.7十368.330.8914.151.571.04精選范本32-422.41-0.714.36-2.78.33-6.21.7-0.030.765.321.3456.673.440.396-1.2=0.18X15=0.756-0.36=0.332.1202.80.025X14=3.84X2.63.06X36=0.35110.

4、160.0048用豎式計(jì)算15.6X13=2.70.04X0.12=9.9845.76X3=7.15X2217.28157.327.516.9-0.131.55-3.91300.3975.2X0.68.4X1.390.75-3.33.68X0.250.923.7X0.01613.76X0.8=0.059211.0086.4X0.54.48X0.468.330.8914.151.571.04精選范本3.1210.923.21.792精選范本0.25X0.0462.52X3.41.08X250.12X0.5X0.16=0.01158.568270.00964.8X0.25=0.125X1.4(保留

5、兩位小數(shù))1.20.182.5-0.7=(保留三位小數(shù))10.1-3.3=3.0606060629.383、脫式計(jì)算(能簡算的要簡算)2.5X7.1X416.12X9916.127116125.585.25X535.4X4.20.042X0.540.76X0.3226.25148.680.022680.243210.75-12.5=(用乘法驗(yàn)算)3.25X9.04=用除法驗(yàn)算)商用循環(huán)小數(shù))3.5710.865.2X0.90.97.28 X9 9+7.284.3X50X0.2642.64X0.5精選范本7284362.6826X15.715.7X243.94+34.3X0.21.2X(9.6-

6、2.4)-4.83.6X9.85-5.4646.01356.862308.05X3.4+7.66.58X4.5X0.92.8X0.5+1.5834.9726.6492.98362.49480.48565070.95.1871007850.812 10.8(2.2750.625)X0.288.9X1.1X4.72.7X5.4X3.9324.90.94.84.8X0.5(1.250.125)X84.8X100.156.5X9956.57.09X10.80.8X7.094.85 + 0.35-1.48.7X17.4 - 8.7X7.412.5X0.4X2.5X80.87X3.16+4.649.5X1

7、010.68-(5.2 -3.5) X1.25精選范本7.3892959.50.540.5-0.81X0.18 4.8930X(15-2.4)6.81+6.81X990.25X185X40 4.4X0.83.4X0.868118500.8(9.37+9.37+9.37+9. 37)X252.37X6.3+2.37X3.793.723.72.5X1.25X0.323.8X10.17.69X1012.5X(3.8X0.04)138.380.38776.693.8X10.10.25X39+0.250.125X7246X0.33+54X0.3338.3810933(8X5.27)X1.256.81+6.81X990.2

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