《北师大四年级数学下册小数乘法简便计算学习资料》由会员分享，可在线阅读，更多相关《北师大四年级数学下册小数乘法简便计算学习资料（16页珍藏版）》请在金锄头文库上搜索。
1、四年级下册小数练习题一、 脱式计算，能简算的要简算。7.81.3+0.9 48-1.824 0.250.460.4 2.51.3+0.9 3.841-3.8 （4+0.4）2.5 0.273.8+0.276.2 2.9100.1 27.5101-27.5 400.630.25 3.6225.7+3.6274.3 0.254.87418.8+23.6+26.4 10.95-3.74-4.26 95.59-（9.59+12.78） 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+9.1 5.93+0.
2、19+2.81 25.48-(9.4-0.52) 3.07-0.38-1.62 35.6-1.8-15.6-7.2 7.3+2.7-7.3+2.7 48.4+2.78+51.6-0.78 23.4+0.8-13.4-7.2 4.8+8.63+5.2+0.37 3.25+2.76+1.75 1.27+3.9+0.73+15.1 5.84-1.8-3.2 132.44-(58.74+19.44) 7.5+4.8-6.5 7.14-0.53-2.47 13.75-(3.75+6.48) 13.45-4.68+2.55 47.8-7.45+8.2 36.8-4.5+6.98 49.8-9.6+8.8
3、15.2-6.8-3.45 1.76+0.65+3.24 0.134+2.66+0.8 7.5+4.9-6.3 3.45+1.79+0.65 4.85+8.63+0.37 1.76+3.44+0.35 36.54-1.76-8.66 8-2.45-1.02 23.4+3.4-0.23 6.02+3.6+1.98 3.07-0.38-1.62 7.5+4.9-6.5 36.8-3.9-6.88 3.285+1.79+0.59 23.4-0.8+13.4 32+4.9-8.6 1.29+3.7+2.71 5.93+0.49+2.06 9-2.45-1.65 21+0.56+11.3 64.89-7
4、.88-13.6二、能简便的要简便计算。12.58.28 0.231.40.238.6 0.125（800.8） 0.40.162.5 5.6101 7.8599 1.15991.15 16.210116.2 450.785.57.82.8+7.20.810.342.50.4 1.251140.88.935.78.933.38.93 4.82102 0.70.46+0.70.54 5.6-4.34+7.346 85.7-（15.3-4.8） 25.4-（15.3+7.7） 3.61.283.09 3.8-0.46-1.72325.6-(0.23+5.6)-1.77 13.75-(4.75+6.
5、48) 7.83+2.34-0.83+6.663.82+2.9+0.18+9.125.48-(9.4-0.52)35.6-1.8-15.6-7.2 5.93+0.19+2.817.3+2.7-7.3+2.73+5.2+0.373.07-0.38-1.6248.4+2.78+51.6-0.78 23.4+0.8-13.4-7.24.8+8.61.27+3.9+0.73+15.15.84-1.8-3.2132.44-(58.74+19.44) 7.5+4.8-6.5 13.45-4.68+2.553.25+2.76+1.7513.75-(3.75+6.48) 7.14-0.53-2.4747.8-
6、7.45+8.2 36.8-4.5+6.9849.8-9.6+8.8 15.2-6.8-3.45 3.45+1.79+0.65 3.45+1.79+0.651.76+0.65+3.24 0.134+2.66+0.87.5+4.9-6.34.85+8.63+0.371.76+3.44+0.3536.54-1.76-8.66 3.45+1.79+0.65 7.5+4.9-6.523.4+3.4-0.23 6.02+3.6+1.983.07-0.38-1.6236.8-3.9-6.883.285+1.79+0.5923.4-0.8+13.41.29+3.7+2.71 21+0.56+11.3 32+
7、4.9-8.6 5.93+0.49+2.06 9-2.45-1.65 一、乘法交换律 0.258.54 12.50.960.8 0.250.734 0.2516.24二乘法结合律 4.3612.58 0.950.254 350.20.50.75500.4三、乘法分配律(1.250.125)8 （204）0.25 (2+0.4)5 （125+2.5）0.8四、 乘法分配律逆应用3.723.56.283.515.62.115.61.1 3.834.563.835.447.0910.80.87.09 27.53.77.53.7 3.92.73.97.310.60.359.60.35 7.60.80.
8、27.6五、把其中一个因数分成两个数的和或差，再按乘法分配律0.8100.1 0.7999 0.85199 3.6510.1 4.60.9 0.65101 4.810.13.61020.39199 8.91.01 0.32403 3.6510.10.859.9 0.65101六、拆分因数1.252.5323.20.2512.5 0.2536 254.48.81.25七、添加因数“1”56.59956.59.7999.7 4.2994.25.411-5.4 1.879.90.187 12.79.91.27八、更改因数的小数点位置知识类+6.663.3+66.667 46572386 4.87.8
9、780.52 3.140.6831.40.032 1010.87-0.9187 3.654.736.50.372.316+2.323+2.3 3140.0433.147.231.40.1551.030.2 321.25 0.4599 5310.10.12596 12.510.8 257.30.4 4521502.1451.585.515.8 4.26.513.494.2 9.992.223.333.34三、直接写得数3.82= 100.7= 13.90= 50.8100= 5.51= 1.80.5= 3.23= 13.10.3=0.081.25= 2.54= 2.58= 0.50.2=0.60
10、.1= 0.70.8= 2.580= 1250.8=3.82= 100.7= 13.90= 508100= 5.51= 1.80.5= 3.23= 13.10.3=0.081.25= 2.54= 2.58= 0.50.2=0.60.1= 0.70.8= 2.580= 1250.8=四、竖式计算2.80.7= 130.15= 0.390.6= 0.38600=7.052.4= 0.467.9= 89.37.6= 60.5400=3.0518= 4.618.9= 40.54.2= 0.372.31= 3.80.12= 0.570.6= 6.40.5= 6.75.8= 9.83.8= 7.86.4=
11、 4.62.7= 4.52.7=51.6= 30.6= 31.2= 6.77.6= 5.47.8= 2.63.6= 3.51.7= 8.32.6= 1.40.7= 4.52.8= 7.42.6= 6.21.4=5.42.6= 2.31.4= 3.71.8= 4.52.3=5.21.6= 3.60.8= 0.661.4= 6.55.8= 0.720.49= 0.420.28= 0.240.19= 2.41.3= 0.720.27= 0.780.32= 0.650.04= 0.230.16= 0.290.15= 0.160.19= 41.2= 74.6= 60.37= 0.280.27= 0.750.42= 2.31
