Question

75. Hoàn thành bảng nhân sau (chú ý rút ngắn gọn nếu có thể) :

Answer 1

x	2/3	-5/6	7/12	-1/24
2/3	4/9	-5/9	7/18	-1/36
-5/6	-5/9	25/36	-35/72	5/144
7/12	7/18	-35/72	49/144	-7/288
-1/24	-1/36	5/144	-7/288	1/576

Answer 2

\(\times\)	\(\dfrac{2}{3}\)	\(\dfrac{-5}{6}\)	\(\dfrac{7}{12}\)	\(\dfrac{-1}{24}\)
\(\dfrac{2}{3}\)	\(\dfrac{4}{9}\)	\(\dfrac{-5}{9}\)	\(\dfrac{7}{18}\)	\(\dfrac{-1}{36}\)
\(\dfrac{-5}{6}\)	\(\dfrac{-5}{9}\)	\(\dfrac{25}{36}\)	\(\dfrac{-35}{72}\)	\(\dfrac{5}{144}\)
\(\dfrac{7}{12}\)	\(\dfrac{7}{18}\)	\(\dfrac{-35}{72}\)	\(\dfrac{49}{144}\)	\(\dfrac{-7}{288}\)
\(\dfrac{-1}{24}\)	\(\dfrac{-1}{36}\)	\(\dfrac{5}{144}\)	\(\dfrac{-7}{288}\)	\(\dfrac{1}{576}\)

Answer 3

X	\(\dfrac{2}{3}\)	\(\dfrac{-5}{6}\)	\(\dfrac{7}{12}\)	\(\dfrac{-1}{24}\)
\(\dfrac{2}{3}\)	\(\dfrac{4}{9}\)	\(\dfrac{-5}{9}\)	\(\dfrac{7}{18}\)	\(\dfrac{-1}{36}\)
\(\dfrac{-5}{6}\)	\(\dfrac{-5}{9}\)	\(\dfrac{25}{36}\)	\(\dfrac{-35}{72}\)	\(\dfrac{5}{144}\)
\(\dfrac{7}{12}\)	\(\dfrac{7}{18}\)	\(\dfrac{-35}{72}\)	\(\dfrac{49}{144}\)	\(\dfrac{-7}{288}\)
\(\dfrac{-1}{24}\)	\(\dfrac{-1}{36}\)	\(\dfrac{5}{144}\)	\(\dfrac{-7}{288}\)	\(\dfrac{1}{576}\)

Answer 4

sao cậu lười tính thế, mạng máy tính ra bấm vài cái có phải xong luôn ko?