Question

tinh  

ạ  \(\frac{3}{5}\)*\(\frac{7}{9}\) = ....................

b   \(\frac{9}{13}\)*\(\frac{17}{18}\)= ....................

c \(\frac{8}{11}\): \(\frac{6}{13}\) = ............................

d \(\frac{14}{15}\) :  \(\frac{7}{11}\) = ............................

Answer 1

\(a,\frac{3}{5}\times\frac{7}{9}=\frac{3\times7}{5\times9}=\frac{3\times7}{5\times3\times3}=\frac{7}{5\times3}=\frac{7}{15}\)

\(b,\frac{9}{13}\times\frac{17}{18}=\frac{9\times17}{13\times18}=\frac{9\times17}{13\times2\times9}=\frac{17}{13\times2}=\frac{17}{26}\)

Câu c,d tương tự

Answer 2

a. =7/15

b. = 17/26

c. = 52/33

d. =22/15