Question

Tính nhanh :

14 / 5 + 9 / 13 + 17 / 13 - 8 / 9 + 17 / 9 - 4 / 5 

Làm nhanh giúp mk nha

 

Answer 1

\(\frac{14}{5}+\frac{9}{13}+\frac{17}{13}-\frac{8}{9}+\frac{17}{9}-\frac{4}{5}\)

\(=\left(\frac{14}{5}-\frac{4}{5}\right)+\left(\frac{9}{13}+\frac{17}{13}\right)+\left(\frac{17}{9}-\frac{8}{9}\right)\)

\(=2+2+1\)

\(=5\)

Answer 2

\(\frac{14}{5}+\frac{9}{13}+\frac{17}{13}-\frac{8}{9}+\frac{17}{9}-\frac{4}{5}\)

\(=\left(\frac{14}{5}-\frac{4}{5}\right)+\left(\frac{9}{13}+\frac{17}{13}\right)-\left(\frac{8}{9}-\frac{17}{9}\right)\)

\(=\frac{10}{5}+\frac{26}{13}-\left(-1\right)\)

\(=2+2+1\)

\(=5\)

Answer 3

14 / 5 + 9 / 13 + 17 / 13 - 8 / 9 + 17 / 9 - 4 / 5 

=(14/5 -4/5)+(9/13 +17/13)+(17/9 - 8/9)

=10/5 +26/13 +9/9

=2+2+1=5

Answer 4

\(\frac{14}{5}+\frac{9}{13}+\frac{17}{13}-\frac{8}{9}+\frac{17}{9}-\frac{4}{5}\)

\(=\left(\frac{14}{5}-\frac{4}{5}\right)+\left(\frac{9}{13}+\frac{17}{13}\right)+\left(\frac{-8}{9}+\frac{17}{9}\right)\)

\(=\frac{10}{5}+\frac{26}{13}+\frac{9}{9}\)

\(=2+2+1\)

\(=4+1\)

\(=5\)

_Chúc bạn học tốt_

Answer 5

\(\frac{14}{5}+\frac{9}{13}+\frac{17}{13}-\frac{8}{9}+\frac{17}{9}-\frac{4}{5}\)

\(=\left(\frac{14}{5}-\frac{4}{5}\right)+\left(\frac{9}{13}+\frac{17}{13}\right)+\left(\frac{17}{9}-\frac{8}{9}\right)\)

\(=\frac{10}{5}+\frac{26}{13}+\frac{9}{9}\)

\(=2+2+1\)

\(=5\)

Answer 6

   14/5 +9/13 + 17/13 - 8/9 + 17/9 - 4/5

= [ 14/5 - 4/5 ] + [ 9/13 + 17/13 ] + [ 17/9 - 8/9 ] 

= 2 + 26/13 + 1

= 3 + 26/13

= 5

           ~ Chúc bạn học tốt ~

Answer 7

14/5 + 9/13 +17/13 - 8/9 +  17/9 - 4/5

= [14/5 - 4/5] + [9/13 + 17/13] - [17/9 - 8/9]

=10/5 + 26/13 + 9/9

=2+2+1

=4 + 1

=5

Answer 8

\(\frac{14}{5}+\frac{9}{13}+\frac{17}{13}-\frac{8}{9}+\frac{17}{9}-\frac{4}{5}\)

\(=\left(\frac{14}{5}-\frac{4}{5}\right)+\left(\frac{9}{13}+\frac{17}{13}\right)+\left(\frac{17}{9}-\frac{8}{9}\right)\)

\(=2+2+1\)

\(=5\)