Question

Tính nhanh:

3/7+4/9+5/11+8/14+10/18+12/22

Giải ra giúp mình nha

Answer 1

3/7 + 4/9 + 5/11 + 8/14 + 10/18 + 12/22

= 3/7 + 4/9 + 5/11 + 4/7 + 5/9 + 6/11

= ( 3/7 + 4/7 ) + ( 4/9 + 5/9 ) + ( 5/11 + 6/11 )

= 7/7 +9/9 + 11/11

= 1 + 1 + 1 

= 3 

tk mk nha , cảm ơn ạ , được ko á ?????????

Answer 2

3/7 + 4/9 + 5/11 + 8/14 + 10/18 + 12/22 = 3

Answer 3

\(\frac{3}{7}\)+ \(\frac{4}{9}\)+ \(\frac{5}{11}\)+ \(\frac{8}{14}\)+ \(\frac{10}{18}\)+ \(\frac{12}{22}\)

= \(\frac{55}{63}\)+ \(\frac{5}{11}\)+ \(\frac{8}{14}\)+ \(\frac{10}{18}\)+ \(\frac{12}{22}\)

= \(\frac{920}{693}\)+ \(\frac{8}{14}\)+ \(\frac{10}{18}\)+ \(\frac{12}{22}\)

= \(\frac{188}{99}\)+ \(\frac{10}{18}\)+ \(\frac{12}{22}\)

= \(\frac{27}{11}\)+ \(\frac{12}{22}\)

= \(3\)

Answer 4

\(\frac{3}{7}+\frac{4}{9}+\frac{5}{11}+\frac{8}{14}+\frac{10}{18}+\frac{12}{22}\)

\(\frac{3}{7}+\frac{4}{9}+\frac{5}{11}+\frac{4}{7}+\frac{5}{9}+\frac{6}{11}\)

=\(\left(\frac{3}{7}+\frac{4}{7}\right)+\left(\frac{4}{9}+\frac{5}{9}\right)+\left(\frac{5}{11}+\frac{6}{11}\right)\)

=\(\frac{7}{7}+\frac{9}{9}+\frac{11}{11}\)

=1 + 1 + 1

=3

Answer 5

3/7 + 4/9 + 5/11 + 8/14 + 10/18 + 12/22

= 3/7+4/9+5/11 + 4/7 + 5/9 + 6/11

= ( 3/7 + 4/9 ) + ( 4/9 + 5/9 ) + ( 5/11 + 6/11 )

= 7/7  9/9 + 11/11

= 1+1+1

= 3

Answer 6

\(=\left(\frac{3}{7}+\frac{8}{14}\right)+\left(\frac{4}{9}+\frac{10}{18}\right)+\left(\frac{5}{11}+\frac{12}{22}\right)\)

\(=\left(\frac{6}{14}+\frac{8}{14}\right)+\left(\frac{8}{18}+\frac{10}{18}\right)+\left(\frac{10}{22}+\frac{12}{22}\right)\)

\(=\frac{14}{14}+\frac{18}{18}+\frac{22}{22}\)

\(=1+1+1=3\)

Answer 7

\(\frac{3}{7}+\frac{4}{9}+\frac{5}{11}+\frac{8}{14}+\frac{10}{18}+\frac{12}{22}\)

\(=\frac{3}{7}+\frac{4}{9}+\frac{5}{11}+\frac{4}{7}+\frac{5}{9}+\frac{6}{11}\)

\(=\left(\frac{3}{7}+\frac{4}{7}\right)+\left(\frac{4}{9}+\frac{5}{9}\right)+\left(\frac{5}{11}+\frac{6}{11}\right)\)

\(=\frac{7}{7}+\frac{9}{9}+\frac{11}{11}\)

\(=1+1+1\)

\(=3\)