\(=\dfrac{1000+250+125}{55}=25\)
\(\dfrac{1000+2.125+125}{55}\)=\(\dfrac{1000+250+125}{55}\)=\(\dfrac{1375}{55}\)=25
\(=\dfrac{1000+250+125}{55}=25\)
\(\dfrac{1000+2.125+125}{55}\)=\(\dfrac{1000+250+125}{55}\)=\(\dfrac{1375}{55}\)=25
Tính B
B=\(\dfrac{\left(\dfrac{2}{5}\right)^7\cdot5^7+\left(\dfrac{9}{4}\right)^3:\left(\dfrac{3}{16}\right)^3}{2^7\cdot5^2+512}\)
\(\dfrac{45^{10}\cdot5^{20}}{75^{15}}\)
\(\dfrac{6^6+6^3+3^3+3^6}{-73}\)
\(\dfrac{27^7+3^{15}}{9^9-27}\)
\(\dfrac{8^{20}+4^{20}}{4^{25}+64^5}\)
Bài 1 : Tính
a) A = \(\left(\dfrac{2}{3}+\dfrac{3}{4}-\dfrac{7}{12}\right):\left(\dfrac{55}{123}+\dfrac{555}{1234}+\dfrac{5555}{12345}\right)\)
b) B = \(\dfrac{5^2}{1.6}+\dfrac{5^2}{6.11}+\dfrac{5^2}{11.16}+...+\dfrac{5^2}{101.106}\)
c) C = \(\dfrac{2x^2+3x-1}{3x-2}\) với \(\left|x-1\right|=2\)
\(B=\left(1+\dfrac{1}{1\cdot3}\right)\left(1+\dfrac{1}{2\cdot4}\right)\left(1+\dfrac{1}{3\cdot5}\right).....\left(1+\dfrac{1}{2021\cdot2023}\right)\)
\(x=\frac{2^3\cdot25^2}{10^2\cdot5^3}\)
Bài 1 : Thực hiện phép tính
a) \(\dfrac{19}{12}\) + | \(\dfrac{-5}{2}\) | + ( \(\dfrac{3}{2}\) )2
b) \(\dfrac{2}{11}\) . \(\dfrac{16}{9}\) - \(\dfrac{2}{11}\) . \(\dfrac{7}{9}\)
Bài 2 : Tìm x , biết
\(\dfrac{a}{8}\) = \(\dfrac{b}{3}\) và a - b = 55
Tính tỉ số a và b biết:
\(A\)=92-\(\dfrac{1}{9}\)-\(\dfrac{2}{10}\)-\(\dfrac{3}{11}\)-...-\(\dfrac{92}{100}\);
\(B\)=\(\dfrac{1}{45}\)+\(\dfrac{1}{50}\)+\(\dfrac{1}{55}\)+...+\(\dfrac{1}{500}\)
10^3+2×5^3+5^3/55
10^ 3+2×5^3+5^3/55