Tính bằng cách hợp lý
giúp mik vs ạ mik đang cần gấp
----- Nội dung ảnh -----
Bài 3. Tính bằng cách hợp lý:
a) \(\left( \frac{1}{67} + \frac{12}{67} + \frac{13}{41} \right) - \left( \frac{79}{67} - \frac{28}{41} \right)\)
b) \(5 - \left( \frac{4}{9} \cdot \frac{18}{13} - \frac{1}{3} \right)\)
c) \(139 \cdot \frac{5}{7} - 2 \cdot 138 = \sqrt{\frac{4}{9}}\)
d) \(\left( - \frac{5}{11} + \frac{13}{18} - \frac{5}{11} \right) + \frac{13}{5} - \frac{1}{33}\)
e) \(\frac{2 \cdot 6^9 - 2^5 \cdot 18^4}{2^2 \cdot 6^8}\)
g) \(\left| 97 \cdot \frac{2}{5} - 125 \cdot \frac{3}{5} \right| + 97 \cdot \frac{2}{5} - 125 \cdot \frac{1}{3}\)
----- Nội dung ảnh -----
Bài 3. Tính bằng cách hợp lý:
a) \(\left( \frac{1}{67} + \frac{12}{67} + \frac{13}{41} \right) - \left( \frac{79}{67} - \frac{28}{41} \right)\)
b) \(5 - \left( \frac{4}{9} \cdot \frac{18}{13} - \frac{1}{3} \right)\)
c) \(139 \cdot \frac{5}{7} - 2 \cdot 138 = \sqrt{\frac{4}{9}}\)
d) \(\left( - \frac{5}{11} + \frac{13}{18} - \frac{5}{11} \right) + \frac{13}{5} - \frac{1}{33}\)
e) \(\frac{2 \cdot 6^9 - 2^5 \cdot 18^4}{2^2 \cdot 6^8}\)
g) \(\left| 97 \cdot \frac{2}{5} - 125 \cdot \frac{3}{5} \right| + 97 \cdot \frac{2}{5} - 125 \cdot \frac{1}{3}\)