= \(\frac{13}{45}x\left(\frac{15}{26}-1\frac{1}{26}+\frac{11}{26}\right)=\frac{13}{45}x\left(\frac{15}{26}-\frac{27}{26}+\frac{11}{26}\right)=\frac{13}{45}x\left(\frac{27}{26}-\frac{27}{26}\right)=\frac{13}{45}x0=0\)
= \(\frac{13}{45}x\left(\frac{15}{26}-1\frac{1}{26}+\frac{11}{26}\right)=\frac{13}{45}x\left(\frac{15}{26}-\frac{27}{26}+\frac{11}{26}\right)=\frac{13}{45}x\left(\frac{27}{26}-\frac{27}{26}\right)=\frac{13}{45}x0=0\)
\(\frac{x}{13}x\frac{15}{26}\)
tìm x
Tìm x là số tự nhiên
A.\(\frac{6+x}{33}=\frac{7}{11}\)
B.\(\frac{15}{26}+\frac{x}{13}=\frac{46}{52}\)
C\(\frac{121}{27}X\frac{54}{11}< x< \frac{100}{21}:\frac{25}{126}\)
D.\(1< \frac{11}{x}< 12\)
tính bằng cách thuận tiện
\(\left(a\right)\frac{21}{11}x\frac{22}{17}x\frac{68}{63}\) \(\left(b\right)\frac{5}{14}x\frac{7}{13}x\frac{26}{25}\)
ai nhanh mk tick cho ^^
1) Tính
a)\(\frac{13}{15}+\frac{13}{35}+\frac{13}{63}+\frac{13}{99}\)
b)\(\left(\frac{15}{1\cdot2\cdot3}+\frac{15}{2\cdot3\cdot4}+\frac{15}{3\cdot4\cdot5}+.....+\frac{15}{18\cdot19\cdot20}\right)\cdot x=1\)
Tính bằng cách thuận tiện nhất
a) \(\frac{11}{5}\)x \(\frac{40}{6}\)x \(\frac{36}{44}\)
b) \(\frac{13}{49}\)x \(\frac{14}{34}\)x \(\frac{17}{26}\)
c) \(\frac{4}{5}\) x \(\frac{8}{13}\)+ \(\frac{4}{5}\)x \(\frac{5}{13}\)
\(x-\left(\frac{20}{11\times13}+\frac{20}{13\times15}+\frac{20}{15\times17}+...+\frac{20}{53\times55}\right)=\frac{3}{11}\)
tính bằng cach thuận tiện nhất
a) \(\frac{21}{11}\)x \(\frac{22}{17}\)x\(\frac{68}{63}\)
b) \(\frac{5}{14}\)x\(\frac{7}{13}\)x \(\frac{26}{25}\)
Tính bằng cách thuận tiện nhất
a) \(\frac{21}{11}X\frac{22}{17}X\frac{68}{63}\) ; b) \(\frac{5}{14}X\frac{7}{13}X\frac{26}{25}\)
Giúp mk nhé!
tính bằng cách thuận tiện nhất :
\(\frac{21}{11}\)x \(\frac{22}{17}\)x \(\frac{68}{63}\)
\(\frac{5}{14}\)x \(\frac{7}{13}\)x \(\frac{26}{25}\)