Question

bài 1:tinh

á 3\4 công 2\5 nhân 5\6

 

b 11\12 :7\24 nhan 21\22

 

Answer 1

A,3/4+2/5x5/6

=3/4+1/3

=9/12+4/12

=13/12

B,11/12:7/24x21/22

=11/12x24/7x21/22

=22/7x21/22

=3

Answer 2

a,3/4+2/5x5/6

=13/12

b,11/12::7/24x21/22

=3

Answer 3

a) \(\frac{3}{4}+\frac{2}{5}\cdot\frac{5}{6}\)

\(=\frac{3}{4}+\frac{1}{3}\)

\(=\frac{9}{12}+\frac{4}{12}=\frac{13}{12}\)