Question

1/3+1/4+1/5+8/10+15/20+20/30

Answer 1

 \(\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{8}{10}+\frac{15}{20}+\frac{20}{30}\)

= \(\left(\frac{1}{3}+\frac{20}{30}\right)+\left(\frac{1}{4}+\frac{15}{20}\right)\)\(+\left(\frac{1}{5}+\frac{8}{10}\right)\)

=     \(1+1+1\)

=   \(3\)

Hok tốt !!!

Answer 2

=(1/3+20/30)+(1/4+15/20)+(1/5+8/10)

=1+1+1

=2+1

=3

Answer 3

(1/3+ 20/30) + ( 1/4 + 15/20 ) + ( 1/5 + 8/10 )

= 1 + 1 + 1

= 3

ck bạn học tốt, tk mk nhé!

Answer 4

\(\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{8}{10}+\frac{15}{20}+\frac{20}{30}\)

= \(\frac{10}{30}+\frac{5}{20}+\frac{2}{10}+\frac{8}{10}+\frac{15}{20}+\frac{20}{30}\)

= \(\left(\frac{10}{30}+\frac{20}{30}\right)+\left(\frac{5}{20}+\frac{15}{20}\right)+\left(\frac{2}{10}+\frac{8}{10}\right)\)

= \(1+1+1\)

= \(3\)