1. COURSE 2 LESSON 4-3 4-3 Find 2 + 1. 3535 4545 3535 4545 + 2 + 2, or 4 Estimate 21 Add the fractions. Add the whole numbers. 3535 4545 21 += 3 7575 Write the mixed number as a sum. 7575 = 3 + = 4 2525 Add the whole numbers. 2525 7575 = 3 + 1 Write as 1. 2525 Check for Reasonableness The answer, 4, is close to the estimate, 4. The answer is reasonable. 2525 Adding and Subtracting Mixed Numbers

2. COURSE 2 LESSON 4-3 4-3 Find 5 + 3. 1212 2323 1212 2323 + 5 + 4, or 9 Estimate 53 2323 4646 Write an equivalent fraction using the LCD, 6. + 3 = + 3 Write an equivalent fraction using the LCD, 6. 5 = 5 1212 3636 = 8 7676 Add the fractions. Add the whole numbers. = 8 + 7676 Write the mixed number as a sum. Adding and Subtracting Mixed Numbers

3. COURSE 2 LESSON 4-3 4-3 (continued) Check for Reasonableness The answer, 9, is close to the estimate, 9. The answer is reasonable. 1616 = 9 1616 Add the whole numbers. = 8 + 1 1616 Write as 1. 7676 1616 Adding and Subtracting Mixed Numbers