\(\frac{\frac{4}{17}-\frac{4}{49}-\frac{4}{131}}{\frac{3}{17}-\frac{3}{49}-\frac{3}{131}}=\frac{4\left(\frac{1}{17}-\frac{1}{49}-\frac{1}{131}\right)}{3\left(\frac{1}{17}-\frac{1}{19}-\frac{1}{131}\right)}=\frac{4}{3}\)
\(\frac{\left(\frac{3}{15}+\frac{1}{4}+\frac{7}{20}\right)\times\frac{17}{49}}{5\frac{1}{3}+\frac{2}{5}}\)
Tính giá trị biểu thức sau:
\(\frac{\left(\frac{3}{15}+\frac{1}{4}+\frac{7}{20}\right)\times\frac{17}{49}}{5\frac{1}{3}+\frac{2}{5}}\)
(4/17-4/49-4/131) : (3/17-3/49-3/131)
\(8\frac{1}{23}+9\frac{61}{131}+6\frac{22}{23}+10\frac{70}{131}=....................\)
\(11\frac{5}{8}+\frac{69}{27}+4\frac{3}{8}+\frac{59}{15}=............................\)
\(\frac{\frac{1}{4}+\frac{1}{24}+\frac{1}{124}}{\frac{3}{4}+\frac{3}{24}+\frac{3}{124}}+\frac{\frac{2}{7}+\frac{2}{17}+\frac{2}{127}}{\frac{3}{7}+\frac{3}{17}+\frac{3}{127}}\)
tính hợp lí
\(\frac{3}{4}\cdot\frac{15}{17}+\frac{3}{4}\cdot\frac{2}{17}+\frac{1}{17}\)
Tính A=112×113×114....×112016×112017A=1\frac{1}{2}\times1\frac{1}{3}\times1\frac{1}{4}....\times1\frac{1}{2016}\times1\frac{1}{2017}A=121×131×141....×120161×120171
tính bằng cách thuận tiện
a. \(\frac{1}{2}\times\frac{2}{3}\div\frac{4}{3}\times\frac{4}{5}\div\frac{6}{5}\times\frac{6}{7}\div\frac{7}{8}\times\frac{8}{9}\div\frac{10}{9}\)
b.\(\frac{27}{49}\times\frac{49}{50}\times\frac{15}{51}\times(\frac{5}{10}-\frac{1}{2})\)
1,Rút gọn
a,\(\frac{2.5.16}{26-35}\)
b,\(\frac{17.5-17}{3-20}\)
c,\(\frac{49+7.49}{49}\)
