Question

Answer 1

a)Các phân số tối giản:\(\dfrac{5}{12};\dfrac{8}{15};\dfrac{11}{21};\dfrac{12}{21}\)

b)Rút gọn:\(\dfrac{6}{12}=\dfrac{1}{2};\dfrac{9}{15}=\dfrac{3}{5}\)

Answer 2

a) Những phân số tối giản là: \(\dfrac{5}{12};\dfrac{8}{15};\dfrac{11}{21}\)

b) \(\dfrac{6}{12}=\dfrac{6:6}{12:6}=\dfrac{1}{2}\) ; \(\dfrac{9}{15}=\dfrac{9:3}{15:3}=\dfrac{3}{5}\) ; \(\dfrac{12}{21}=\dfrac{12:3}{21:3}=\dfrac{4}{7}\)

Answer 3

\(a,\dfrac{5}{12};\dfrac{8}{15};\dfrac{11}{21}\\ b,\dfrac{6}{12}=\dfrac{1}{2};\dfrac{9}{15}=\dfrac{3}{5};\dfrac{12}{21}=\dfrac{4}{7}\)