Question

5 / 10 + 40 / 20 = 

làm rõ dàng ra cho mình nha mình nha mình cảm ơn

Answer 1

10/20+40/20=50/20=5/2

Answer 2

\(\dfrac{5}{10}+\dfrac{40}{20}=\dfrac{5.2+40}{20}=\dfrac{50}{20}=\dfrac{5}{2}\)

Answer 3

\(\dfrac{5}{10}+\dfrac{40}{20}=\dfrac{5x2}{10x2}+\dfrac{40}{20}=\dfrac{10+40}{20}=\dfrac{50}{20}=\dfrac{5}{2}\)

Answer 4

\(=\dfrac{5\times2}{10\times2}+\dfrac{40}{20}=\dfrac{10+40}{20}=\dfrac{50}{20}=\dfrac{5}{2}\)