Question

a, 7/8 + 3                   b,2 - 5/4

c,4 x 5/9                     d, 3/8 : 2

Answer 1

31/8.   3/4

20/9.     3/16

Answer 2

a: \(\dfrac{7}{8}+3=\dfrac{3\cdot8+7}{8}=\dfrac{31}{8}\)

b: \(2-\dfrac{5}{4}=\dfrac{2\cdot4-5}{4}=\dfrac{3}{4}\)

\(4\cdot\dfrac{5}{9}=\dfrac{20}{9}\)

d: \(\dfrac{3}{8}:2=\dfrac{3}{16}\)

Answer 3

Câu a: 7/8 + 3= 7/8 + 24/8= 31/8

Câu b: 2-5/4= 8/4 - 5/4= 3/4

Câu c: 4 x 5/9= 20/9

Câu d: 3/8 : 2= 3/16

Answer 4

31/8.           3/4.

20/9.           3/16.