\(A=\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}=\frac{77}{60}\)
\(B=\frac{2}{5}X\frac{15}{4}:\frac{5}{16}+\frac{1}{2}=\frac{53}{10}\)
TK NHA
Ai tk mình đi mình bị âm nè mình hứa sẽ k lại!
Cảm ơn trc nha
A = 77/60
B =53 /10
Chúc bạn học giỏi
Thank you very much
\(A=\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}\)\(\left(MC=60\right)\) \(B=\frac{2}{5}.\frac{15}{4}:\frac{5}{6}+\frac{1}{2}\)
\(A=\frac{1.30}{2.30}+\frac{1.20}{3.20}+\frac{1.15}{4.15}+\frac{1.12}{5.12}\) \(B=\frac{3}{2}:\frac{5}{6}+\frac{1}{2}\)
\(A=\frac{30+20+15+12}{60}\) \(B=\frac{3}{2}.\frac{6}{5}+\frac{1}{2}\)
\(A=\frac{77}{60}\) \(B=\frac{9}{5}+\frac{1}{2}\)
\(B=\frac{9.2}{5.2}+\frac{1.5}{2.5}\)
\(B=\frac{18+5}{10}\)
\(B=\frac{23}{10}\)
Tk cho mình r mình tk cho