Các câu hỏi tương tự
\(\frac{x+52}{21}+\frac{x+51}{22}=\frac{x+50}{23}+\frac{x+49}{24}\)
\(\frac{x-25}{1979}-\frac{x-24}{1980}-\frac{x-23}{1981}-\frac{x-22}{1982}=\frac{x-1979}{25}-\frac{x-1980}{24}-\frac{x-1981}{23}-\frac{x-1982}{22}\)
Bài 1:Tìm x Biết
a\ \(x-\frac{10}{3}=\frac{7}{15}\times\frac{3}{5}\)
b\ \(x+\frac{3}{22}=\frac{27}{121}\times\frac{11}{9}\)
c\ \(\frac{8}{23}\times\frac{46}{24}-x=\frac{1}{3}\)
d\ \(1-x=\frac{49}{65}\times\frac{5}{7}\)
\(\frac{25}{49}\)x \(\frac{21}{29}\)-\(\frac{25}{49}\)x\(\frac{7}{29}\)+ \(\frac{24}{49}\)x\(\frac{15}{29}\)
Tính các tổng sau:Cfrac{5}{7}.frac{5}{11}+frac{5}{7}.frac{2}{11}-frac{5}{7}.frac{14}{11}Tìm xx-frac{3}{10}frac{5}{7}x+frac{3}{22}frac{27}{121}.frac{11}{9}frac{8}{23}.frac{46}{24}-xfrac{1}{3}1-xfrac{49}{65}.frac{5}{7}x+frac{4}{5.9}+frac{4}{9.13}+frac{4}{13.17}+...+frac{4}{41.45}frac{-37}{45}
Đọc tiếp
Tính các tổng sau:
\(C=\frac{5}{7}.\frac{5}{11}+\frac{5}{7}.\frac{2}{11}-\frac{5}{7}.\frac{14}{11}\)
Tìm x
\(x-\frac{3}{10}=\frac{5}{7}\)
\(x+\frac{3}{22}=\frac{27}{121}.\frac{11}{9}\)
\(\frac{8}{23}.\frac{46}{24}-x=\frac{1}{3}\)
\(1-x=\frac{49}{65}.\frac{5}{7}\)
\(x+\frac{4}{5.9}+\frac{4}{9.13}+\frac{4}{13.17}+...+\frac{4}{41.45}=\frac{-37}{45}\)
Tính: \(B=\frac{100^2+1^2}{100\cdot1}+\frac{99^2+2^2}{99\cdot2}+\frac{98^2+3^2}{98\cdot3}+...+\frac{52^2+49^2}{52\cdot49}+\frac{51^2+50^2}{51\cdot50}\)
Bài 1: Thực hiện phép tính a,22frac{1}{2}.frac{7}{9}+50%-1,25b,1,4.frac{15}{49}-left(frac{4}{5}+frac{2}{3}right):2frac{1}{5}c,left(frac{-1}{2}right)^2-frac{7}{16}:frac{7}{4}+75%Bài 2: Tìm xa,1frac{3}{5}+frac{7}{12}:xfrac{-9}{4}b,left(2frac{4}{5}.x+50right):frac{2}{3}-51c,|frac{3}{4}.x-frac{1}{2}|frac{1}{4}
Đọc tiếp
Bài 1: Thực hiện phép tính
a,\(22\frac{1}{2}.\frac{7}{9}+50\%-1,25\)
b,\(1,4.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\)
c,\(\left(\frac{-1}{2}\right)^2-\frac{7}{16}:\frac{7}{4}+75\%\)
Bài 2: Tìm x
a,\(1\frac{3}{5}+\frac{7}{12}:x=\frac{-9}{4}\)
b,\(\left(2\frac{4}{5}.x+50\right):\frac{2}{3}=-51\)
c,\(|\frac{3}{4}.x-\frac{1}{2}|=\frac{1}{4}\)
Chưng Minh:\(\frac{1}{21}\)+\(\frac{1}{22}\)+\(\frac{1}{23}\)+....+\(\frac{1}{49}\)+\(\frac{1}{50}\)<\(1\frac{1}{12}\)
Tìm x biết :
a)\(\frac{2}{3}x-50\%x-\left(-\frac{4}{5}\right):1\frac{3}{5}=-0,12\)\(+1\frac{3}{25}\)
b)\(\left(-1\frac{1}{6}+\frac{2}{3}-\frac{3}{4}\right):x+\left(-1\frac{11}{12}\right).1\frac{21}{23}=-6\frac{1}{3}\)
c)\(50\%x-\frac{1}{3}x-\left(\frac{-2}{3}\right)^2.\left(-1\frac{1}{8}\right)=-119\frac{3}{4}+120\frac{5}{6}\)