Sửa đề \(P=\frac{0,75-0,6+\frac{3}{7}+\frac{3}{3}}{2,75-2,2+\frac{11}{7}+\frac{11}{3}}=\frac{\frac{3}{4}-\frac{3}{5}+\frac{3}{7}+\frac{3}{3}}{\frac{11}{4}-\frac{11}{5}+\frac{11}{7}+\frac{11}{3}}=\frac{3\left(\frac{1}{4}-\frac{1}{5}+\frac{1}{7}+\frac{1}{3}\right)}{11\left(\frac{1}{4}-\frac{1}{5}+\frac{1}{7}+\frac{1}{3}\right)}=\frac{3}{11}\)
Bài làm :
\(P=\frac{0,75-0,6+\frac{3}{7}+\frac{3}{3}}{2,75-2,2+\frac{11}{7}+\frac{11}{3}}\)
\(=\frac{\frac{3}{4}-\frac{3}{5}+\frac{3}{7}+\frac{3}{3}}{\frac{11}{4}-\frac{11}{5}+\frac{11}{7}+\frac{11}{3}}\)
\(=\frac{3}{11}.\frac{\frac{1}{4}-\frac{1}{5}+\frac{1}{7}+\frac{1}{3}}{\frac{1}{4}-\frac{1}{5}+\frac{1}{7}+\frac{1}{3}}\)
\(=\frac{3}{11}\)
Học tốt nhé
