五年级小数简便运算

Four short words sum up what has lifted most successful individuals above the crowd: a little bit more.-author-date五年级小数简便运算五年级小数简便运算一、 课堂练习 1.乘法结合律 0.1253.698 (5.235.235.235.23) 25 12.50.960.80.8（4.31.25） 0.258.54 0.251.250.6732 2. 乘法分配律（a+b）c=ac+bc(2.50.25) 4 0.85199 0.63199 8.591019.310.1 1219.8 159.7 3. 乘法分配律ac+bc=（a+b）c一般型0.3615.70.3613.7 5.641.288.725.64 0.990.810.1190.19 积不变型8.63250.063250 2.493.80.24962添加x1型 特殊型 4.37994.37 10.138.673.867 2.5(48) 12.5 除变乘型 连减与乘法混合型7.730.52.272 33.4143.410.25 54.80.30.33.914. 小数除法简便运算被除数除数同时除以一个数型 6048 9.95.5连除变除以两个数的积型 分配被除数型 3.990.1258 (6.448) 0.8 二、 课后练习 0.2582.12 （12.51.25）8 5.718.34570.834 3.874.125.883.87 8.85.5 0.880.780.110.220.8 4.340.250.255.560.025 5.64995.64 5.220.1 3.71.630.3715.3 2.5(4.214.218.42) 3.25199 1.251.86320.25 (7.254) 0.9 2.730.1257.278 56.3426.340.5 11.430.812.5 21.560.40.43.84 8032 7.56101 1.252.5(84)20.135.223.522-