Question

Rút gọn phân số:

a) \(\frac{-17.13+17.2}{11.2-11.19}\)

 

Answer 1

\(\frac{-17.13+17.2}{11.2-11.19}=\frac{17.\left(-13\right)+17.2}{11.\left(2-9\right)}=\frac{17.\left(-11\right)}{11.\left(-7\right)}=\frac{17}{7}\)

Answer 2

\(\frac{-17.13+17.2}{11.2-11.19}=\frac{-17\left(13-2\right)}{11\left(2-19\right)}=\frac{-17.11}{11.\left(-17\right)}=1\)

Answer 3

\(\frac{-17.13+17.2}{11.2-11.19}=\frac{-17.\left(13-2\right)}{11.\left(2-19\right)}=\frac{-17.11}{11.\left(-17\right)}=1\)

Answer 4

\(\frac{-17\cdot13+17\cdot2}{11\cdot2-11\cdot9}=\frac{17\left(-13+12\right)}{11\left(2-9\right)}=\frac{-17}{-77}=\frac{17}{77}\)

Answer 5

\(\frac{-17.13+17.2}{11.2-11.19}\)

\(=\frac{-17\left(13-2\right)}{11\left(2-19\right)}\)

\(=\frac{-17.11}{11.\left(-17\right)}\)

\(=1\)