Question

[Thư Nguyễn]

a) 5/9 + 3/8 = ?

b) 8/12 - 1/3 = ?

c) 4/7 x 5/2 = ?

d) 5/11 : 15/22 = ?

Answer 1

[Chuu]

40/72 + 27/72= 67/72

8/12 - 4/12 = 4/12 = 1/3

10/7

5/11 x 22/15 = 2/3

Answer 2

[YangSu]

\(a,\dfrac{5}{9}+\dfrac{3}{8}=\dfrac{40}{72}+\dfrac{27}{72}=\dfrac{67}{72}\)

\(b,\dfrac{8}{12}-\dfrac{1}{3}=\dfrac{8}{12}-\dfrac{4}{12}=\dfrac{4}{12}=\dfrac{1}{3}\)

\(c,\dfrac{4}{7}\times\dfrac{5}{2}=\dfrac{20}{14}=\dfrac{10}{7}\)

\(d,\dfrac{5}{11}:\dfrac{15}{22}=\dfrac{5}{11}\times\dfrac{22}{15}=\dfrac{110}{165}=\dfrac{22}{33}\)