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when you add mixed numbers you have a whole number but adding fraction does not.
To find the sum of two mixed numbers, turn the mixed numbers into improper fractions (multiply the base with the denominator and add the numerator), then add the two fractions. To add the two fractions, find the LCD (lowest common denominator) and add the two numerators, but leave the denominators the same.
2 mixed numbers can only be a whole when the 2 numerators add up to the number
27.3 + 2.7
False [ I THINK ]