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1、小数计算题用竖式计算85.441642.847101.7967.51521.24360.7362343.51235.2176.210.032101.451.30.2791.23.80.660.311.971.569.62.9150.063.771.80.02965.220.39.990.024.670.952.449.4350.0025.66.5（循环小数的用简便方法，除不尽保存2位小数）：8.20.120.80.94.731.251.2（商用循环小数）（用除法验算）32428.336.21.70.032.410.72.50.7=（保存三位小数）10.13.3=10.7512.5=（用乘法验算
2、）3.259.04=脱式计算（能简算的要简算）2.57.1416.1299+16.125.20.9+0.97.2899+7.284.8100.14.85 + 0.35 1.4 6.81+6.8199 （9.37+9. 37+9.2.51.250.326.80.750.59.599解方程X+8.3=10.7x+0.8=904.3500.256.599+56.58.7X17.4-8.70.251854037+9.37）2.52.5（3.80.04）3.750.125-2.7513.50.980.5x=30642.640.57.0910.8-0.87.097.412.50.42.584.40.83.
3、40.82.376.3+2.373.70.125721.53+23.47.212.58.8x-5.6=9.45.3+7x=7.43x+5=4.8X-0.8X=612x+8x=4.87（x-2）=4948+2x=360.2x-0.4+0.5=3.79.4-0.4x=16.222-0.4x=126.7-60.3=6.7120.5x=8126-3.5x=56算（一）10.1-0.89=3.4 -1.4=7.82-7.2=2.19+9.1=8.1-5.1=0.728-0.24=0.8+0.18=0.89-0.25=1一0.98=0.048+0.52=19.9+11.1=1871000=1.57=1.3
4、28=0.78=10.32=50.6=0.90.3=3.50.2=2.010=100.05=0.137=0.21100=0.74=0.054=40.3=0.17+0.06=1.02-0.09=7200800=0.17+0.6=0.83-0.6=0.98-0.09=0.20.78=600500=10.2+0.02=(二)0.15+0.7=10.2+0.2=8500500=0.35+0.5=0.35+0.63=350070=3.8+0.38=7500250=0.95-0.05=450+780=4.5-0.4=9.5-5=3309=9.53-1.53=9.5-0.5=3.5+2.4=1-0.95=0
5、.3+0.27=0.47+0.13=4.5+4=4-0.6=0.95+0.05=2.53.2=0.74+0.16=2.310O=9.8-4.8=48040=0.531OO=5.1+2.3=12580=0.07810=0.52+0.4=7012=(三)0.251OO=3.4-2.8=0.6-0.37=0.0521O=10+0.08=1-0.75=0.51000=7.82+0.3=13.5+6.5=3.0510O=1.2-0.8=21.6-12.6=63100=0.83-0.5=0.76+0.14=801OOO=2.7+0.4=3.5 +4.8=3.5+2.4=5+0.07=1-0.61=0.47
6、+0.23=0.25+0.75=3.7+0.33=0.51+0.33=1-0.6=8-4.6=0.52+0.4=6.45+5.5=9.53-1.53=8.8-6.7=10+0.08=9.5-7.3=7.82+0.3=8.8-6.7=9.5-7.3=1-0.95=0.96-0.35=9.53-1.53=0.25+0.75=0.83-0.5=12.58=2.34=3.250=0.450=300.1=2.63=4.12=0.350.2=2.52=0.510=0.68=2.12=0.70.8=0.0420=5.6+0.4=4.7+2.3=6.9-2.5=7.20.8=63.4=1.40.5=0.75100=0.020.5=3.60.3=6.37=0.750.25=0.1258=4.80.3=0.5628=
