www.5129.net > (18一5)÷2=

(18一5)÷2=

(18一5)÷2 =18÷2-5/2 =9-2.5 =6.5

(1/2+1/3)÷3/5-17/18 =5/6÷3/5-17/18 =25/18-17/18 =4/9 本题已解答,满意 请点击采纳答案

(3√18+(1/5)√50-4√(1/2) )÷√32 =(9√2+√2-2√2 )÷(4√2) =(8√2)÷(4√2) =2

(1)18.9÷2.3≈8.2; (2)24.5÷0.65≈37.7; (3)1.4÷0.45≈3.1;

解下列方程x减,二点四等于七点四三点五加x等于四x除以三十六等于三x加五点五等于十四点 x-2.4=7.4 x=7.4+2.4 x=9.8 3.5+x=4 x=4-3.5 x=0.5 x÷36=3 x=36×3 x=108 x+5.5=14.5 x=14.5-5.5 x=9

?18÷(?3)2+5×(?12)3?(?15)÷5=-18÷9+5×(-18)+3=-2-58+3=38.

(1)-20-(-18)=-20+18=-2;(2)3×(-2)÷12=-6÷12=-12;(3)-22+|5-8|+24÷(-3)×13=-4+3-83=-1-83=--323;(4)(-1)-14×[2-(-3)2]=-1-14×(-7)=1+74=234;(5)4a2-4b2+2ab-4a2+3b2=4a2-4a2-4b2+3b2+2ab=2ab-b2;(6)3a2-2(a2-a+1...

(-3)X(-9)-8x(-5) =27+40 =67 (-3)÷(-2/5)÷(-1/4) =-3×5/2×4 =-3×5×2 =-30 18-6÷(-2)x(-1/3) =18-6÷2/3 =18-6×3/2 =18-9 =9

(1)(-18)-(-5)+(-2)-(+15)=-18+5-2-15=-35+5=-30;(2)-2.5÷58×(?14)=52×85×14=1;(3)(?3)2×[?23+(?59)]=9×[-119]=-11.

解:(1) ;(2)-7。

网站地图

All rights reserved Powered by www.5129.net

copyright ©right 2010-2021。
www.5129.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com