Question

Tính

A, 2/3 * 3/4 * 4/5 : 1/5

B, 2/5 * 3/4 * 5/6 : 3/4

Answer 1

day la bai tinh phan so dung ko

Answer 2

A, 2/3 * 3/4 * 4/5 : 1/5

=1/2x4/5:1/5

=2/5:1/5

=2

Answer 3

B, 2/5 * 3/4 * 5/6 : 3/4

=3/10x5/6:3/4

=1/4:3/4

=1/3

Answer 4

\(\frac{2}{5}.\frac{3}{4}.\frac{5}{6}:\frac{3}{4}=\frac{2}{5}.\frac{3}{4}.\frac{5}{6}.\frac{4}{3}=\frac{2.3.5.4}{5.4.6.3}=\frac{2}{6}=\frac{1}{3}\)

Answer 5

\(\frac{2}{3}.\frac{3}{4}.\frac{4}{5}:\frac{1}{5}=\frac{2}{3}.\frac{3}{4}.\frac{4}{5}.\frac{5}{1}=\frac{2.3.4.5}{3.4.5}=2\)