Section 3.1 Addition and Subtraction of Like Fractions 165 Subtracting Like Fractions Example 2 Subtract. Write the answer as a fraction or whole number. a. b. Solution: a. Subtract the numerators. 13 9 4 3 11 9 b. Subtract the numerators. Write the difference over the common denominator. Simplify. 3 3 1 2. Order of Operations Example 3 reviews the order of operations. Order of Operations Step 1 Perform all operations inside parentheses first. Step 2 Simplify expressions containing exponents or square roots. Step 3 Perform multiplication or division in the order that they appear from left to right. Step 4 Perform addition or subtraction in the order that they appear from left to right. 1 3 4 1 3 2 9 13 2 9 4 3 1 3 13 9 2 9 Write the difference over the common denominator. The fraction is already in lowest terms because 11 and 9 share no common factors. Concept Connections 3. Which is the correct sum Answers 3. 4. 5. 6. 1 6 11 10 9 7 3 Avoiding Mistakes Note that the process to add fractions is different from the process to multiply fractions. but 2 7 3 7 5 7 2 7 3 7 6 49 Skill Practice Subtract. Write the answer as a fraction or whole number. 5. 6. 5 2 3 2 14 11 8 11 for or 4. Which is the correct product for or 10 3 10 9 23 53 ? 7 3 7 6 23 53 ?
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