\(M=\frac{9}{40}-\frac{11}{60}+\frac{13}{84}-\frac{15}{112}\)
\(M=\left(\frac{9}{40}-\frac{11}{60}\right)+\left(\frac{13}{84}-\frac{15}{112}\right)\)
\(M=\frac{1}{24}+\frac{1}{48}\)
\(M=\frac{1}{16}\)
M = \(\frac{9}{40}\)- \(\frac{11}{60}\)+ \(\frac{13}{84}\)- \(\frac{15}{112}\)
M = \(\frac{1}{24}\)+ \(\frac{1}{48}\)
M = \(\frac{1}{16}\)
\(M=\frac{9}{40}-\frac{11}{60}+\frac{13}{84}-\frac{15}{112}\)
\(M=\frac{1}{24}+\frac{13}{84}-\frac{15}{112}\)
\(M=\frac{11}{56}-\frac{15}{112}\)
\(M=\frac{1}{16}\)
Đúng lun,
Tk mk nha!