2/5 + 3/10
Make the denominator the same.
4/10 + 3/10
Add the numerator.
7/10
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one and five tenths or one and a half
four fifths is equal to eight tents, so three tenths plus eight tenths is eleven tenths, or one and one tenth
To add three fifths and seven tenths, we need to find a common denominator. The least common multiple of 5 and 10 is 10, so we convert three fifths to six tenths. Therefore, six tenths plus seven tenths equals thirteen tenths. Thirteen tenths can be simplified to one and three tenths, or 1.3 as a decimal.
9/10
Thirteen tenths