\(\frac{5}{6}+\frac{2}{6}=\frac{7}{6}\)

Ai k mk k cho 3 k

Ai k mk k cho 3 k

=\(\frac{14}{7}\)ai k mk k lại 3 cái

=\(\frac{14}{7}\)ai k mk k lại 3 cái

\(=\frac{8}{4}\)\(=2\)

ai k mk mk k cho 3 k

\(\frac{5}{4}+\frac{3}{4}\)
\(=\frac{8}{4}\)
\(=2\)

6*x=4*5

6*x=20

x=20:6

X=3,3

x*6=7*8

x*6=56

x=56:6

x=9,3

\(\frac{2}{5}+\frac{3}{5}=\frac{5}{5}=1\)

\(\frac{2}{5}+\frac{3}{5}=1\)k mk nha

=\(\frac{9}{3}\)=3 ai k mk mk k lại 3 k

Tổng trên bằng:

4/3+5/3=9/3=3

Đáp số:3

x+6+7=90

x+6=90+7

x+6=97

x=97-6

x=91

Vậy x = 91

x=77

ai k mk mk 

k alij cho !

\(\frac{8}{15}+\frac{16}{30}+\frac{3}{5}+\frac{9}{10}+2\frac{3}{5}\)

\(=\frac{8}{15}+\frac{16}{30}+\frac{3}{5}+\frac{9}{10}+\frac{13}{5}\)

\(=\frac{16+16+18+27+78}{30}\)

\(=\frac{155}{30}\)

\(=\frac{31}{6}\)

Hc tốt #

\(\frac{8}{15}\)+\(\frac{16}{30}\)+\(\frac{3}{5}\)+\(\frac{9}{10}\)+2\(\frac{3}{5}\)

=\(\frac{16}{30}\)+\(\frac{16}{30}\)+\(\frac{18}{30}\)+\(\frac{27}{30}\)+\(\frac{13}{5}\)

=\(\frac{16+16+18+27}{30}\)+\(\frac{78}{30}\)

=\(\frac{77}{30}\)+\(\frac{78}{30}\)= \(\frac{155}{30}\)

số cần tìm là:\(\frac{5}{1}+\frac{2}{1}=7\)

Ds:7

Số cần tìm là:

\(\frac{5}{1}+\frac{2}{1}\) = \(\frac{7}{1}\)

Đáp số: \(\frac{7}{1}\)