Question

1/10+2/20+3/30+4/40+5/50+6/60+7/70+8/80+9/90

hãy kb với mình nhé

Answer 1

=1/10+1/10+1/10+1/10+1/10+1/10+1/10+1/10+1/10=9/10

Answer 2

Bằng 9/10

Answer 3

\(\frac{1}{10}+\frac{2}{20}+\frac{3}{30}+\frac{4}{40}+\frac{5}{50}\)\(+\frac{6}{60}+\frac{7}{70}+\frac{8}{80}+\frac{9}{90}\)

\(=\frac{1}{10}+\frac{1}{10}+...+\frac{1}{10}\): có 9 phân số \(\frac{1}{10}\)

\(=\frac{1}{10}x9\)

\(=\frac{9}{10}\)

Answer 4

\(=\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}+\frac{1}{10}\)

\(=\frac{9}{10}\)

k mk nha các bạn