Question

a)     \(\left(\frac{-3}{5}+\frac{1}{10}\right).\left(3-\frac{1}{2}\right)\)

b)    \(17,2-15+12,8\)

 c)    \(2\frac{1}{3}:\frac{2}{3}\)

Đăng bài dễ cho các bạn lấy link.

 

Answer 1

a)\(\left(\frac{-3}{5}+\frac{1}{10}\right).\left(3-\frac{1}{2}\right)=\frac{-1}{2}.\frac{5}{2}=\frac{-5}{4}=-1,25\)

b)\(17,2-15+12,8=\left(17,2+12,8\right)-15=30-15=15\)

c)\(2\frac{1}{3}:\frac{2}{3}=\frac{7}{3}.\frac{3}{2}=\frac{7}{2}=3,5\)

Answer 2

a,\(\left(\frac{-3}{5}+\frac{1}{10}\right)\)x\(\left(3-\frac{1}{2}\right)\)                      

     \(\left(\frac{-6}{10}+\frac{1}{10}\right)\)x\(\left(\frac{6}{2}-\frac{1}{2}\right)\)      

       \(\frac{-1}{2}\)x\(\frac{5}{2}\)  =    \(\frac{-5}{4}\)                             

k mình nha,