Question

\(\frac{2}{10}+\frac{?}{?}=1\)

Answer 1

2/10 + ?/? = 1

                = 1 - 2/10

                =   8/10

Answer 2

= 1-2/10

= 4/5

Answer 3

gọi số cần tìm là x

\(\frac{2}{10}+x=1\)

\(x=1-\frac{2}{10}\)

\(x=\frac{4}{5}\)

Answer 4

\(\frac{2}{10}+\frac{?}{?}=1\)

\(\frac{?}{?}=1-\frac{2}{10}\)

\(\frac{?}{?}=\frac{8}{10}\)

Answer 5

\(\frac{2}{10}+\frac{?}{?}=1\)

             \(\frac{?}{?}=1-\frac{2}{10}\)

               \(\frac{?}{?}=\frac{8}{10}=\frac{4}{5}\)