Question

Tính rồi rút gọn

a . 2 / 5 : 2 / 3

b 4 / 7 : 4 / 5

​c. 1 / 6 : 1 / 3

​d. 1 / 4 : 1 / 8

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Answer 1

a=2/5:2/3=6/10rút gọn=3/5

b=4/7:4/5=20/28rút gọn=5/7

c=1/6:1/3=3/6rút gọn=1/2

d=1/4:1/8=8/4rút gọn=2/1=2

Answer 2

a)3/5

b)5/7

c)1/2

d)2

Answer 3

a. \(\frac{2}{5}:\frac{2}{3}=\frac{2.3}{5.2}=\frac{6}{10}=\frac{3}{5}\)

b. \(\frac{4}{7}:\frac{4}{5}=\frac{4}{7}.\frac{5}{4}=\frac{20}{28}=\frac{5}{7}\)

c. \(\frac{1}{6}:\frac{1}{3}=\frac{1}{6}.\frac{3}{1}=\frac{3}{6}=\frac{1}{2}\)

d. \(\frac{1}{4}:\frac{1}{8}=\frac{1}{4}.\frac{8}{1}=\frac{8}{4}=2\)

Answer 4

2/5 : 2/3 = 6/10 = 3/5

4/7:4/5=20/28=5/7

1/6:1/3=3/6=1/2

1/4:1/8=4/8=1/2

Answer 5

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