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The 7 & 5 can be added together, but you must find a common denominator between 4/5 and 1/2. 10 is the LCD, so 4/5 becomes 8/10 (multiply numerator and denominator by 2) and 1/2 becomes 5/10 (multiply numerator and denominator by 5). Now 5/10 + 8/10 = 13/10, which is 1 & 3/10. So we have 7 + 5 + 1 + 3/10,

which is 13 3/10

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Q: What is 7 and four fifths plus 5 and one half?
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