1、四五年级数学计算题练习25.6-(0.23+5.6)-1.77 13.75-(4.75+6.48)7.83+2.34-0.83+6.66 3.82+2.9+0.18+9.125.48-(9.4-0.52) 35.6-1.8-15.6-7.2 5.93+0.19+2.81 7.3+2.7-7.3+2.748.4+2.78+51.6-0.78 23.4+0.8-13.4-7.2 4.8+8.63+5.2+0.37 3.07-0.38-1.621.27+3.9+0.73+15.1 5.84-1.8-3.2 132.44-(58.74+19.44) 7.5+4.8-6.53.25+2.76+1.75
2、13.75-(3.75+6.48) 7.14-0.53-2.47 13.45-4.68+2.5547.8-7.45+8.2 36.8-4.5+6.98 49.8-9.6+8.8 15.2-6.8-3.451.76+0.65+3.24 0.134+2.66+0.8 7.5+4.9-6.3 3.45+1.79+0.654.85+8.63+0.37 1.76+3.44+0.35 36.54-1.76-8.66 8-2.45-1.0223.4+3.4-0.23 6.02+3.6+1.98 3.07-0.38-1.62 7.5+4.9-6.536.8-3.9-6.88 3.285+1.79+0.59 2
3、3.4-0.8+13.4 32+4.9-8.61.29+3.7+2.71 5.93+0.49+2.06 9-2.45-1.65 21+0.56+11.3一、乘法：5.62.9 3.771.8 0.0296 5.220.3 9.990.024.670.9 52.44 1.666.1 9.40.02 5.66.54.882.9 5.614.3 8.92.4 5.555 9.770.021.385.1 8.788 2.661 0.050.2 4.81.7575.7 9.462.8 17.86.4 1.54.9 2.50.885.55.2 2.223.33 7.685 6.020.3 6.788二、除
4、法：（循环小数的用简便方法，除不尽保留 2 位小数）85.4416 42.6710 1.70.001 7.50.15 30.666 21.2436 0.73623 43.512 35.217 39.6246.210.03 2101.4 51.30.27 91.23.8 0.7560.18 0.660.3 11.971.5 69.62.9 38.40.8 150.068.20.1 20.80.9 76.45.4 4.73 1.251.23242 14.362.7 8.336.2 1.70.03 2.410.7三、用竖式计算 （保留两位位小数）0.3961.2= 0.7560.36= 15.613
5、= 0.1815= 0.02514= 3.0636= 0.040.12 3.842.6 5.763 7.1522 90.753.3 3.680.2516.90.13 1.553.9 3.70.016 13.760.8= 5.20.6 8.41.3 6.40.5 4.480.4 5.255 35.44.2 0.0420.54 0.760.3240.250.046 2.523.4 1.0825 0.120.50.16 4.80.25 0.1251.4（保留两位小数）2.50.7= （保留三位小数） 10.13.3= （商用循环小数）10.7512.5= （用乘法验算） 3.259.04= （用除法验算）
