ldcf.net
当前位置:首页 >> 递等式计算50.4×1.9%1. >>

递等式计算50.4×1.9%1.

(1)50.4×1.9-1.9=50.4×1.9-1.9×1=(50.4-1)×1.9=49.4×1.9=93.86;(2)44.28÷0.9÷4.1=49.2÷4.1=12;(3)1.25×32×0.25=(1.25×8)×(4×0.25)=10×1=10;(4)8.6×9.9=8.6×(10-0.1)=8.6×10-8.6×0.1=86-0.86=85.14;(5)18÷2.5÷0.4=18÷(2....

(3/4-1/16)×(1/9+1/3)用递等式计算 =(12/16-1/16)x(1/9+3/9) =11/16x4/9 =11/36

前面-1/4,后面恕我每笔口算不出

3.9+4.08+3.92+1.1递等式计算 =3.9+1.1+(4.08+3.92) =5+8 =13

(1)7.9×12.5,=(8-0.1)×12.5,=8×12.5-1×12.5,=100-12.5,=87.5;(2)25.38-1.43-4.38-4.57,=25.38-4.38-1.43-4.57,=(25.38-4.38)-(1.43-4.57),=21-6,=15;(3)90+10÷0.4×2.5,=90+25×2.5,=90+62.5,=152.5;(4)0.8×0.4×(7.6...

5/9-(2/9+1/6) =5/9-2/9-1/6 =1/3-1/6 =2/6-1/6 =1/6

直接算最简便 3.8÷1.9+0.57÷1.9 = 2+0.3 = 2.3

十一分之九除4/5-4分之一除以九分之十一用递等式计算 解: 9/11÷4/5-1/4÷11/9 =9/11×5/4-1/4×9/11 =9/11×(5/4-1/4) =9/11×1 =9/11

1)999+2+99+9+9999+2,=999+99+9+9999+(2+2),=(1000-1)+(100-1)+(10-1)+(10000-1)+4,=11110-3+4,=11109;(2)6.9×4+310÷25,=27.6+12.4,=40;(3)(3.5+6.5-6.5+3.5)÷4×2.5,=(10-6.5+3.5)÷4×2.5,=7÷4×2.5,=1.75×2.5,=4....

网站首页 | 网站地图
All rights reserved Powered by www.ldcf.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com