Question

Tính nhanh

a) 3/4x8/5x5/9

b)6/7:3/14:1/2

Answer 1

\(\frac{3}{4}\cdot\frac{8}{5}\cdot\frac{5}{9}=\frac{2}{3}\)

\(\frac{3}{7}:\frac{3}{14}:\frac{1}{2}=4\)

Answer 2

cậu ghi lòi  giải ra được không

Answer 3

a) \(\frac{3}{4}x\frac{8}{5}x\frac{5}{9}=\frac{3x8x5}{4x5x9}=\frac{120}{180}=\frac{2}{3}\)

b) \(\frac{6}{7}:\frac{3}{14}:\frac{1}{2}=\frac{6}{7}x\frac{14}{3}x\frac{1}{2}=\frac{84}{42}=2\)

Answer 4

3/4x8/5x5/9=3/4x(8/5x5/9)=3/4x8/9=2/3

6/7:3/14:1/2=4:1/2=8