1、(北师大版)六年级数学下册 简便计算班级_姓名_一、口算下面各题。102.65 0.90.08 528349 614.4 240.0412.342.3 03.8 0.770.33 71.4 67.50.257.284 51.41.6 4001258 1.940.5800.125= 3 = 6 6= 2 ( + )= 10 2=7318357513.273.27= ( )12= 187.711187.7= 1 62.5%=4 8二、写出下列每题在简便运算时所运用的定律或性质。4 +3.25 +6.8 25(80.4)1.25 7 (2 )312 5423( ) ( ) ( )( + )72 93
2、.53 162.512874217( ) ( ) ( )三、用简便方法计算。1125997 998+1246+9989 (870087087)871258.8 1.34.253.73.75 17.15(3.52.85)3.4993.4 4.81.01 0.4(2.573) (1.61.61.61.6)25 ( ) 9465187367102512.32.455.74.55 2 0.1250.256497519264.2870.6421300 78367.87417 17 8542137 0.125 0.5 2.42 +4.58 43 87212143125100 4.253 (2 1 ) 26565433.83.93.90.10.13.9 12.1( + )105 152四、在算式中填上一个数,使它能用乘法分配律进行简便计算并算出来。15+0.12225