Question

a)19/13 +-7/11 +-4/11-6/13

b)-3/5x3/13+-3/5x10/13+3/5

( lm dùm ak cần gấp ngay bh ak )

Answer 1

\(a.\frac{19}{13}+\frac{-7}{11}+\frac{-4}{11}-\frac{6}{13}\)

\(=\left(\frac{19}{13}-\frac{6}{13}\right)+\left(\frac{-7}{11}+\frac{-4}{11}\right)\)

\(=1+\left(-1\right)\)

\(=0\)

Answer 2

(19/13-6/13)+(-7/11+-4/11)

1+-1

0

Answer 3

\(a,\frac{19}{13}+\frac{-7}{11}+\frac{-4}{11}-\frac{6}{13}\)

\(=\left(\frac{19}{13}-\frac{6}{13}\right)-\left(\frac{7}{11}+\frac{4}{11}\right)\)

\(=1-1=0\)

Answer 4

-3/5.(10/13+3/13)+3/5

-3/5.1+3/5

-3/5+3/5

0

Answer 5

\(b.\frac{-3}{5}\times\frac{3}{13}+\frac{-3}{5}\times\frac{10}{13}+\frac{3}{5}\)

\(=\frac{3}{5}\times\frac{-3}{13}+\frac{3}{5}\times\frac{-10}{13}+\frac{3}{5}\times1\)

\(=\frac{3}{5}\times\left(\frac{-3}{13}+\frac{-10}{13}+1\right)\)

\(=\frac{3}{5}\times\left(-1+1\right)\)

\(=\frac{3}{5}\times0\)

\(=0\)

Answer 6

\(\frac{-3}{5}.\frac{3}{13}+\frac{-3}{5}.\frac{10}{13}+\frac{3}{5}\)

\(=\frac{-3}{5}\left(\frac{3}{13}+\frac{10}{13}\right)+\frac{3}{5}\)

\(=-\frac{3}{5}+\frac{3}{5}=0\)