Question

a) \(3+\dfrac{5}{2}\)

b) \(\dfrac{2}{8}:\dfrac{4}{8}\)

c) \(\dfrac{13}{5}-2\)

CHI TIẾT NHA MN

Answer 1

a) \(3+\dfrac{5}{2}=\dfrac{6}{2}+\dfrac{5}{2}=\dfrac{11}{2}\)

b) \(\dfrac{2}{8}:\dfrac{4}{8}=\dfrac{2}{8}.\dfrac{8}{4}=\dfrac{2}{4}=\dfrac{1}{2}\)

c) \(\dfrac{13}{5}-2=\dfrac{26}{10}-\dfrac{20}{10}=\dfrac{6}{10}=\dfrac{3}{5}\)

Answer 2

a)\(=\dfrac{6}{2}+\dfrac{5}{2}=\dfrac{11}{2}\)

b)\(=\dfrac{2}{8}\cdot\dfrac{8}{4}=\dfrac{2}{4}=\dfrac{1}{2}\)

c)\(=\dfrac{13}{5}-\dfrac{10}{5}=\dfrac{3}{5}\)

Answer 3

a  \(\dfrac{18}{6}+\dfrac{15}{6}=\dfrac{33}{6}=\dfrac{11}{2}\)

b \(\dfrac{2}{8}\times\dfrac{8}{4}=\dfrac{2}{1}\times\dfrac{1}{4}=\dfrac{2}{4}=\dfrac{1}{2}\)

c \(\dfrac{13}{5}-\dfrac{10}{5}=\dfrac{3}{5}\)

Answer 4

a,\(3+\dfrac{5}{2}=\dfrac{6}{2}+\dfrac{5}{2}=\dfrac{11}{2}\)

b,\(\dfrac{2}{8}:\dfrac{4}{8}=\dfrac{2}{8}x\dfrac{8}{4}=\dfrac{16}{32}=\dfrac{1}{2}\)

c,\(\dfrac{13}{5}-2=\dfrac{13}{5}-\dfrac{10}{5}=\dfrac{3}{5}\)