Question

Thực hiện phép tính:

 a)\(\frac{1}{6}-\frac{2}{3}\)

b)\(\frac{2.3+4.6+14.21+18.27+26.39}{3.5+6.10+21.35+27.45+39.65}\)

CÁC BẠN GIÚP MIK VS, MIK ĐANG CẦN GẤP!!!

Answer 1

\(a,\frac{1}{6}-\frac{2}{3}\)

\(=\frac{1}{6}-\frac{4}{6}=-\frac{3}{6}=-\frac{1}{2}\)

Answer 2

a, -1/2

b, 6517/9805

Answer 3

\(b,\frac{2.3+4.6+14.21+18.27+26.39}{3.5+6.10+21.35+27.45+39.65}\)

\(=\frac{2+4+14+18+26}{5+10+35+45+65}\)

\(=\frac{64}{115}\) ( ko chắc  ) 

Answer 4

b. 

\(\frac{2.3+4.6+14.21+18.27+26.39}{3.5+6.10+21.35+27.45+39.65}\)

\(=\frac{2.3\left(1+2.2+7.7+9.9+13.13\right)}{3.5\left(1+2.2.+7.7+9.9+13.13\right)}\)

\(=\frac{2}{5}\)