If you add three tenths to four tenths the sum will be seven tenths.
It is: 7 tenths
4
2 and 7 tenths
one half
3
1/4 + 2/4 = 3/4
seven and 4 fifths
3/4 plus 3/10 as a decimal is 1.05
7 and 1/10
Its 8/10 or 4/5
13/10
It is: 4/10 + 2/10 = 6/10 = 3/5 in its simplest form