www.ndwl.net > 简便计算(5.58十6.3÷3.5)

简便计算(5.58十6.3÷3.5)

(5.58十6.3÷3.5) =5.58+1.8 =7.38

36.7 解析: 40.3-6.3÷3.5×2 =40.3-9÷5×2 =40.3-18÷5 =40.3-3.6 =37-0.3 =36.7

46.3-6.3÷3.5×2简便计算 =46.3-6.3÷0.7÷5x2 =46.3-9÷5x2 =46.3-1.8x2 =46.3-3.6 =42.7

把6.3和35同时扩大10倍,除法补零的方法懂吗?就是加上小数点后在小数点后面添加零使两个数的位数看起来相等。之后因为63和35有公约数7,所以你可以把7提出来,变成0.9÷5也就是9÷50,这样就好算多了

没有简便方法 5.8十6.3÷9x0.5 =5.8+0.7×0.5 =5.8+0.35 =6.15

一个数除以8就可以看成乘0.125 3.7×0.125+6.3÷8 =3.7×0.125+6.3×0.125 =0.125×(3.7+6.3) =0.125×10 =1.25

(1)15.64-2.53-7.47=15.64-(2.53+7.47),=15.64-10,=5.64;(2)3.7+6.3÷0.6-0.4=3.7+10.5-0.4,=13.8;(3)3.5÷[(0.45-0.38)×0.1]=3.5÷[0.07×0.1],=3.5÷0.007,=500;(4)5.6×7.2+4.4×7.2=(5.6+4.4)×7.2,=10×7.2,=72.

6.3÷3.5 =(7*0.9)÷(7*0.5)=1.8

28.98/6.3-3.15 =(0.9*7*4.6)/(0.9*7)-3.15 =4.6-3.15 =1.45

(6.3x6.4+6.3x3.6)÷1.4 =(6.4+3.6)×6.3÷1.4 =10×(6.3÷1.4) =10×4.5 =45

网站地图

All rights reserved Powered by www.ndwl.net

copyright ©right 2010-2021。
www.ndwl.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com