Question

4/99 x 18/5 :12/11 + 3/5

Answer 1

= 8/55 :12/11 +3/5

=2/15 +3/5

=11/15 

Answer 2

\(\frac{4}{99}.\frac{18}{5}:\frac{12}{11}+\frac{3}{5}\)

=\(\frac{4}{99}.\frac{18}{5}.\frac{11}{12}+\frac{3}{5}\)

= \(\frac{2}{15}+\frac{3}{5}\)

= \(\frac{2}{15}+\frac{9}{15}=\frac{11}{15}\)

P/S: Dấu . là dấu x đó.

Answer 3

\(\frac{4}{99}\cdot\frac{18}{5}:\frac{12}{11}+\frac{3}{5}\)   

\(=\frac{4}{99}\cdot\frac{18}{5}\cdot\frac{11}{12}+\frac{3}{5}\)   

\(=\frac{4\cdot3\cdot3\cdot2\cdot11}{9\cdot11\cdot5\cdot12}+\frac{3}{5}\)    

\(=\frac{2}{3\cdot5}+\frac{3}{5}\)   

\(=\frac{2}{15}+\frac{9}{15}\)   

\(=\frac{11}{15}\)