1、7.8（得数保留两位小数）2.86.25=（计算并验算）5.871.9=（得数保留两位小数128.82.3验算：12.65.6验算：19.1583.1验算：6.30.42=1.261276=1.40.56=验算：51.30.644833（商用循环小数表示）542.42.574.2（得数精确到百分位）4.771.8=3.080.27=63.552.05=40.87.5=69.023.4=0.540.76（结果保留两位小数）4911=（用循环小数表示）3.561.5=6.27356.52.18=4.9440.48=4.0745=7215=1.240.45=2.7*42.70.14=11.54.5（
2、得数保留两位小数）7.23.6=15.24=8.40.56=551.26=8.846.1（保留两位小数）80.9=（商用循环小数表示）3.68.50.263.08（得数保留两位小数）139.20.1679.30.265.2324930.155.190.30.973.74.50.02=40.52.74725=9.46.92.614.726.40.620.9705.6=23.80.17=3.52.5=3.55.691.49.5381.9=8.56.69 =37.8+3.02=1030.25=95.480.573.8=10.13.3=（商用循环小数表示）71.342=（得数保留两位小数）45.965
3、4.721.81.520.880.860.2525.580.34（得数保留两位小数）6.7242=2.17.862.2（得数保留两位小数）12.615372=*9.7444.8=1.50.38=0.3722.4=（商精确到0.1）4.490.32=（商到整数，并写出余数）1.890.54=41.423=15.155=0.378.4=5.980.23=1.4=3.140.9=1.21.553.9*42126.150.44=15.124.5=176.40.6350.41.917.10.382.560.98（保留两位小数）3.250.96（保留两位小数）7.83700.471.56.881.97.3
4、-3.28=0.4520.456.31.25 =150.8=1.259.50.25=计算并验算：3.482.782.545求积、商的近似数： 5.593.4（保留一位小数）78.62.2（保留两位小数）1.06233.3=4.224.50.63=9.744*8-2.67=1.640.35=* 360.39573.93.2=0.15=276.584.7=40.62.9=6.760.1890.18=3.8860.58=6.70.34=2.7182.352.653.4（保留一位小数）0.14=验算：7.6891.24.70.43=12.40.45（保留一位小数）7.80.376.141342.63.
5、916（保留两位小数）0.28验算13.944.81639.61.621.48.96.1（商保留两位小数）2.30.467.560.07563.9（得数保留两位小数）1.836.723.60.3120.455.880.560.678.4（结果保留一位小数）251.5（商用循环小数表示）2.094.6=4.683.9=696.2=（商保留两位小数）4.61.084.287.6*8.9590.125=7.7995=5.62961（得数保留两位小数）2.051.284.35.244.53.671.728=0.12=1.711=24+7.9=7.53-6.11=0.420.2940.750.46=0.843.5=0.2672.8（商保留两位小数）0.9249.5=9.10.17（得数保留两位小数）8-0.9219.62183.42.558.30.52
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