Tính (rút gọn các kết quả nếu có thể)
a) \(\frac{2}{7}\ \cdot \frac{-4}{9}\)
b) \(18\cdot \frac{17}{-45}\)
c) \(\frac{25}{7}\ .\ \frac{-8}{35}\)
d) \(\frac{-9}{40}\ .\ \frac{32}{-15}\ \)
A.a) \(\frac{-8}{63}\) b) \(\frac{-34}{5}\)
c) \(\frac{-40}{49}\) d) \(\frac{12}{25}\)
B.a) \(\frac{1}{63}\) b) \(\frac{-34}{5}\)
c) \(\frac{-4}{49}\) d) \(\frac{12}{25}\)
C.a) \(\frac{-8}{63}\) b) \(\frac{-3}{5}\)
c) \(\frac{1}{49}\) d) \(\frac{12}{5}\)
D.a) \(\frac{-8}{3}\) b) \(\frac{-4}{5}\)
c) \(\frac{-10}{49}\) d) \(\frac{12}{5}\)
a) \(\frac{2}{7}\ \cdot \frac{-4}{9}\)
b) \(18\cdot \frac{17}{-45}\)
c) \(\frac{25}{7}\ .\ \frac{-8}{35}\)
d) \(\frac{-9}{40}\ .\ \frac{32}{-15}\ \)
A.a) \(\frac{-8}{63}\) b) \(\frac{-34}{5}\)
c) \(\frac{-40}{49}\) d) \(\frac{12}{25}\)
B.a) \(\frac{1}{63}\) b) \(\frac{-34}{5}\)
c) \(\frac{-4}{49}\) d) \(\frac{12}{25}\)
C.a) \(\frac{-8}{63}\) b) \(\frac{-3}{5}\)
c) \(\frac{1}{49}\) d) \(\frac{12}{5}\)
D.a) \(\frac{-8}{3}\) b) \(\frac{-4}{5}\)
c) \(\frac{-10}{49}\) d) \(\frac{12}{5}\)
Loga
Hóa Học lớp 12
