Subtract fractions and then subtract the whole numbers. Sometimes you may need to borrow from the whole number. Ex: 3 1/4 - 1 3/4 (3 1/4 would be written as 2 5/4) so the equation would be 2 5/4 - 1 3/4 = 1 2/4
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A mixed number is a whole number combined with a fraction like 3 7/9. (That was just a random example). A like number is a number that had the same denominator (the bottom or right number of the fraction) as the other fraction like 2/9 and 3/9. So like mixed number is a mixed number that has the same denominator as the other number.
By the definition of like fractions, the denominators are the same.
No
They have to have the same denominator.
When adding or subtracting fractions with different denominators, it is necessary to find a common denominator to solve the equation. A common denominator is like a common multiple, except its function is as the bottom number in a fraction.