Question

4/5 x 5/8 =  

7/15 + 4/5 =

2/3 - 3/8

1/2 chia 2/5

giải chi tiết

Answer 1

\(\dfrac{4}{5}\times\dfrac{5}{8}=\dfrac{20}{40}=\dfrac{1}{2}\)

\(\dfrac{7}{15}+\dfrac{4}{5}=\dfrac{7}{15}+\dfrac{12}{15}=\dfrac{19}{15}\)

\(\dfrac{2}{3}-\dfrac{3}{8}=\dfrac{16}{24}-\dfrac{9}{24}=\dfrac{7}{24}\)

\(\dfrac{1}{2}\div\dfrac{2}{5}=\dfrac{1}{2}\times\dfrac{5}{2}=\dfrac{5}{4}\)

Answer 2

1/2

19/15

7/24

5/4

Answer 3

4/5 x 5/8

= 20/40

= 1/2

7/15 + 4/5

= 7/15 + 12/15

= 19/15

2/3 - 3/8

= 16/24 - 9/24

= 7/24

1/2 : 2/5

= 1/2 x 5/2

= 5/4

Answer 4

1/2

19/15

7/24

5/4

Answer 5

1/2

19/15

7/24

5/4