Make it simpler by saying that five-tenths is one-half ... so you can rewrite it as what is seven and one-half plus ten and one-half?
then you add 7 + 10 = 17 and one-half + one-half = one... .17+1=18
therefore 7 and 5/10 + 10 and 1/2 = 18
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Seven plus three is equal to ten. This is because when you add seven and three together, you are combining the quantity of seven with the quantity of three to get a total of ten. In mathematical terms, this can be represented as 7 + 3 = 10.
Seven eights plus three eights is ten eights. Now, possibly you intended to ask about eighths, rather than eights. Ten eighths is equal to one and a quarter. However, ten eights is equal to 80. The extra h makes a difference.
It is plus three degrees.
10 1/3 + 7/9 = 11 1/9 or eleven and one ninth.
sixty