Question

1+(7/10+1/4)=... Phép tính phân số

Answer 1

\(1+\left(\dfrac{7}{10}+\dfrac{1}{4}\right)\\ =1+\left(\dfrac{14}{20}+\dfrac{5}{20}\right)\\ =1+\left(\dfrac{14+5}{20}\right)\\ =1+\dfrac{19}{20}\\ =\dfrac{20}{20}+\dfrac{19}{20}\\ =\dfrac{20+19}{20}\\ =\dfrac{39}{20}\)

Answer 2