Question

28/23+19/21-5/23+7/10+2/21

Answer 1

\(\frac{28}{23}+\frac{19}{21}-\frac{5}{23}+\frac{7}{10}+\frac{2}{21}\)

\(=\left(\frac{28}{23}-\frac{5}{23}\right)+\left(\frac{19}{21}+\frac{2}{21}\right)+\frac{7}{10}\)

\(=\frac{23}{23}+\frac{21}{21}+\frac{7}{10}\)

\(=1+1+\frac{7}{10}=2\frac{7}{10}=2,7\)

Answer 2

28/23+19/21-5/23+7/10+2/21 = 2,7 nhé

Answer 3

28/23+19/21-5/23+7/10+2/21=(28/23-5/23)+(19/21+2/21)+7/10=23/23+21/21+7/10=1+1+7/10=2+7/10=27/10

Answer 4

28/23+19/21-5/23+7/10+2/21 = 2,7

Answer 5

28/23+19/21-5/23+7/10+2/21

=(28/23-5/23)+(19/21+2/21)+7/10

=1+1+7/10

=27/10