Bài 24: Tính

11. \(25.5^3.\dfrac{1}{625}.5^2\)

12. \(4.32:\left(2^3.\dfrac{1}{16}\right)\)

13. \(5^2.3^5.\left(\dfrac{3}{5}\right)\)

Bài 24: Tính

2. \(\left(0,125^3\right).512\)

3. \(\left(0,25^4\right).1024\)

4. \(\dfrac{90^3}{15^3}\)

5. \(\dfrac{790^4}{79^4}\)

Tính thuận tiện

2, \(\dfrac{5}{7}.\dfrac{5}{11}+\dfrac{5}{7}.\dfrac{2}{11}-\dfrac{5}{7}\)

Tính thuận tiện

3, \(\left(\dfrac{1}{99}+\dfrac{12}{999}-\dfrac{123}{9999}\right).\left(\dfrac{1}{2}-\dfrac{1}{3}-\dfrac{1}{6}\right)\)

4, \(\dfrac{2}{3.5}+\dfrac{2}{5.7}+\dfrac{2}{7.9}+...+\dfrac{2}{97.99}\)

5, \(\dfrac{3}{5.7}+\dfrac{3}{7.9}+\dfrac{3}{9.11}+...+\dfrac{3}{59.61}\)

Tính nhanh nếu có thể

\(\left[\left(\dfrac{1}{9}:\dfrac{8}{27}\right):\dfrac{-1}{3}\right]:\dfrac{81}{28}\)

\(\left(\dfrac{-7}{15}\right).\dfrac{5}{8}.\dfrac{15}{-7}.\left(-32\right)\)

\(0,5+\dfrac{1}{3}+0,4+\dfrac{5}{7}+\dfrac{1}{6}-\dfrac{4}{35}\)

Tính nhanh nếu có thể

\(\left(\dfrac{-3}{11}:\dfrac{5}{22}\right).\left(\dfrac{-15}{3}:\dfrac{26}{3}\right)\)

\(\dfrac{5}{12}.\left(\dfrac{-3}{4}\right)+\dfrac{7}{12}.\left(\dfrac{-3}{4}\right)\)

\(\dfrac{1}{7}.\dfrac{-3}{8}+\dfrac{1}{7}.\dfrac{-13}{8}\)

\(\dfrac{3}{5}.\dfrac{13}{46}-\dfrac{1}{10}.\dfrac{16}{23}\)

\(\dfrac{2}{3}-4.\left(\dfrac{1}{2}+\dfrac{3}{4}\right)\)

\(\left(-\dfrac{1}{3}+\dfrac{5}{6}\right).11-7\)