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Anonymous
6 tenths
2/5 = 4/10
2/10 + 4/10 = 6/10
Wiki User
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3.8 + 2.9 = 6.7
4/10 plus 2/5 = 4/5 in its simplest form
2.7 + 2.8 = 5.5 = 5 and 1/2
It is the same as: 1/5+2/5 = 3/5
7.4or 74 tenths