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3.4-Adding and Subtracting Mixed NumbersMATH 081Catherine Conway
Adding and Subtracting Mixed Numbers
Adding & Subtracting
• Add or subtract the whole number
• Add or subtract the fraction – must have common denominator first.
• Convert fraction into a mixed number and repeat step 1 and 2 if necessary. (Carry over)
Borrowing in Subtraction with Mixed numbers
• Find common denominator
• Borrow 1 whole from the whole number
• Add it to the proper fraction
• Follow steps for adding and subtracting
Method #2 for adding and subtracting fractions (no borrowing)
• Convert all mixed numbers into improper fraction
• Find common denominator
• Rewrite equivalent fractions with common denominator
• Add or subtract
• Convert improper fractions back to a mixed number
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