Make lower number the same
so 4/5 = 8/10
then 8/10 + 7/10 = 15/10 = 1.5
Answer: One and a half
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8/10 + 4/5 = 8/5 or 13/5
3/5 + 2/4 = 6/10 + 5/10 = 11/10
It is: 1/2+4/5 = 13/10 or as 1 and 3/10
1/10 + 2/5 = 1/10 + 4/10 = 5/10 = 1/2
3/5 + 2/10 = 6/10 + 2/10 = 8/10 = 4/5.