Question

Tính :

3 - 3/⁴ =

2/⁷ x 5 =

15/⁷ : 2 =

Answer 1

3 - 3/4 = 12/4 - 3/4 = 9/4
2/7 x 5 = 10/7
15/7 : 2 = 15/7 x 1/2 = 15/14

Answer 2

\(3-\dfrac{3}{4}=\dfrac{12}{4}-\dfrac{3}{4}=\dfrac{9}{4}\)

\(\dfrac{2}{7}\times5=\dfrac{10}{7}\)

\(\dfrac{15}{7}:2=\dfrac{15}{7}\times\dfrac{1}{2}=\dfrac{15}{14}\)

Answer 3

3 - 3/⁴ = 12/4 - 3/4 = 9/4

2/⁷ x 5 = = 10/7

15/⁷ : 2 = 15/7 x 1/2 = 15/14

Answer 4

\(\dfrac{1}{2}\)

\(\dfrac{10}{7}\)

\(\dfrac{15}{14}\)

Answer 5

\(3-\dfrac{3}{4}=\dfrac{3}{1}-\dfrac{3}{4}=\dfrac{12}{4}-\dfrac{3}{4}=\dfrac{9}{4}\)

\(\dfrac{2}{7}x5=\dfrac{2}{7}x\dfrac{5}{1}=\dfrac{10}{7}\)

\(\dfrac{15}{7}:2=\dfrac{15}{7}:\dfrac{2}{1}=\dfrac{15}{7}x\dfrac{1}{2}=\dfrac{15}{14}\)