Section 3.4 Addition and Subtraction of Mixed Numbers 193 Subtracting Mixed Numbers with Borrowing Example 7 We can borrow 1 or equivalently from the whole number 4. 5 8 1 The difference is 138 . 88 4 3 8 8 2 3 8 TIP: The borrowed 1 is written as because the common denominator is 8. 88 TIP: The subtraction problem can be checked by adding: 3 8 4 258 2 5 8 138 3 8 8 3 14 1 ✓ Subtracting Mixed Numbers by Using Improper Fractions Subtract by first converting to improper fractions.Write the answer as a mixed number. Solution: Write each mixed number as an improper fraction. Convert the fractions to like fractions. The LCD is 20. 52 4 5 4 208 20 113 20 19 5 4 5 95 20 Subtract the like fractions. 10 2 5 4 3 4 52 5 19 4 10 2 5 4 3 4 Example 8 Answers 9. 10. 4 7 18 6 5 6 Write the result as a mixed number. 5 20113 100 13 5 13 20 Subtract. Solution: 4 In this case, we have no fractional part from which to subtract. 2 5 8 4 2 5 8 Skill Practice Subtract. 9. 10 3 1 6 Skill Practice Subtract by first converting to improper fractions.Write the answer as a mixed number. 10. 8 2 9 3 5 6
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