Question

a ) \(\frac{5}{7}\) +     \(\frac{7}{14}\)

b ) \(\frac{5}{3}\) +     \(\frac{9}{12}\) +  \(\frac{8}{9}\)

ai tick mình mình tick lại ( lên điểm nha )

 . 

Answer 1

a ) \(\frac{5}{7}\) +     \(\frac{7}{14}\)

=   \(\frac{10}{14}\) +     \(\frac{7}{14}\)

= \(\frac{10+7}{14}\)= \(\frac{17}{14}\)

b ) \(\frac{5}{3}\) +    \(\frac{9}{12}\) +    \(\frac{8}{9}\)

= \(\frac{20}{12}\) +    \(\frac{9}{12}\) + \(\frac{8}{9}\)

=     \(\frac{29}{12}\) +  \(\frac{8}{9}\)

= \(\frac{357}{108}\)

Answer 2

A, \(=\frac{10}{14}+\frac{7}{14}\)

\(=\frac{17}{14}\)

B.\(=\frac{20}{12}+\frac{9}{12}+\frac{8}{9}\)

\(=\frac{29}{12}\)+\(\frac{8}{9}\)

\(=\frac{119}{36}\)

k mình nha

Answer 3

\(a,\frac{5}{7}+\frac{7}{14}\)

\(=\frac{10}{14}+\frac{7}{14}\)

\(=\frac{17}{14}\)

\(b,\frac{5}{3}+\frac{9}{12}+\frac{8}{9}\)

\(=\frac{20}{12}+\frac{8}{9}\)

\(=\frac{357}{108}\)

Answer 4

a) 5/7 + 7/14 = 17/14

b) 5/3 + 9/12 + 8/9 = 119/36

Học tốt ^^

Answer 5

a) \(\frac{5}{7}+\frac{7}{14}=\frac{10}{14}+\frac{7}{14}=\frac{17}{14}\)

b) \(\frac{5}{3}+\frac{9}{12}+\frac{8}{9}=\frac{20}{12}+\frac{9}{12}+\frac{8}{9}=\frac{29}{12}+\frac{8}{9}=\frac{119}{36}\)