\(\dfrac{12}{30}=\dfrac{...}{20}\)
\(\dfrac{12}{30}=\dfrac{2}{5}\)
\(\dfrac{2}{5}\cdot20=8\)
Chọn D
12/30 = 4/10 = 8/20 [C nhá]
12/30=.../20
... : 20=12/30
... = 12/30 x 20
... = 8
Chọn D
12/30=12:3/30:3=4/10=8/20
Câu trả lời là D.8
\(\dfrac{12}{30}=\dfrac{4}{10}=\dfrac{8}{20}=D\)