a) \(\frac{\left(-1\right)^3}{15}+\left(-\frac{2}{3}\right):2\frac{2}{3}-\left|-\frac{5}{6}\right|\)

b) \(1\frac{5}{13}-0,\left(3\right)-\left(1\frac{4}{9}+\frac{18}{13}-\frac{1}{3}\right)\)

c) \(\left|97\frac{2}{3}-125\frac{3}{5}\right|+97\frac{2}{5}-125\frac{1}{3}\)

d) \(\frac{2\cdot6^9-2^5\cdot18^4}{2^2\cdot6^8}\)

Tính = cák hợp lý:

a) \(139\frac{5}{7}:\frac{2}{3}-138\frac{2}{7}:\sqrt{\frac{4}{9}}\)

b) \(\left(\frac{-5}{11}:\frac{13}{18}-\frac{5}{11}:\frac{13}{5}\right)+\frac{-1}{33}\)

c) \(\left|97\frac{2}{3}-125\frac{3}{5}\right|+97\frac{2}{5}-125\frac{1}{3}\)

\(|97\frac{2}{3}-125\frac{3}{5}|+97\frac{2}{5}-125\frac{1}{3}\)

Tính D= |97\(\frac{2}{3}\) -125 \(\frac{3}{5}\)|+97\(\frac{2}{5}\) -125\(\frac{1}{3}\) 

\(H=\frac{\left(1+97\right)\left(1+\frac{97}{2}\right)\left(1+\frac{97}{3}\right)\left(1+\frac{97}{4}\right)+...+\left(1+\frac{97}{99}\right)}{\left(1+99\right)\left(1+\frac{99}{2}\right)\left(1+\frac{99}{3}\right)\left(1+\frac{99}{4}\right)+...+\left(1+\frac{99}{97}\right)}\)

giải PT: a, (4x-5)² (2x-3)(x-1)=9

b,\(\frac{5}{x-8}+1=\frac{23}{x^2-5x-24}+\frac{2}{x+3}\)

c,(\(\left(\frac{x-1}{99}+\frac{x-99}{1}\right)+\left(\frac{x-3}{97}+\frac{x+97}{3}\right)+\left(\frac{x-5}{93}+\frac{x-95}{5}\right)=6\)

Tính \(C=\left(\frac{1}{125}-\frac{1}{1^3}\right)\left(\frac{1}{125}-\frac{1}{2^3}\right)\left(\frac{1}{125}-\frac{1}{3^3}\right)...\left(\frac{1}{125}-\frac{1}{25^3}\right)\)

Tính giá trị của biểu thức \(A=\left(\frac{1}{125}-\frac{1}{1^3}\right).\left(\frac{1}{125}-\frac{1}{2^3}\right).\left(\frac{1}{125}-\frac{1}{3^3}\right)...\left(\frac{1}{125}-\frac{1}{19^3}\right).\left(\frac{1}{125}-\frac{1}{20^3}\right)\)

Tính nhanh : A= \(\left(\frac{1}{125}-\frac{1}{1^3}\right)\cdot\left(\frac{1}{125}-\frac{1}{2^3}\right)\cdot\left(\frac{1}{125}-\frac{1}{3^3}\right).....\left(\frac{1}{125}-\frac{1}{25^3}\right)\)