Question

[Lâm Nguyễn Hải]

tính

a)1 + 3/4   b)4/5 -3/8  c)1 : 2/3  d)2/5 x 5/2

Answer 1

[Nguyễn Huy Tú]

a, \(1+\dfrac{3}{4}=\dfrac{7}{4}\)

b, \(\dfrac{4}{5}-\dfrac{3}{8}=\dfrac{32-15}{40}=\dfrac{17}{40}\)

c, \(1:\dfrac{2}{3}=\dfrac{1.3}{2}=\dfrac{3}{2}\)

d, \(\dfrac{2}{5}.\dfrac{5}{2}=1\)

Answer 2

[ka nekk]

a)1 + 3/4=7/4

   b)4/5 -3/8=17/40

  c)1 : 2/3=3/2

  d)2/5 x 5/2=1