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

COURSE 2 LESSON Find , or 9 Estimate Write an equivalent fraction using the LCD, = + 3 Write an equivalent fraction using the LCD, 6. 5 = = Add the fractions. Add the whole numbers. = Write the mixed number as a sum. Adding and Subtracting Mixed Numbers

COURSE 2 LESSON (continued) Check for Reasonableness The answer, 9, is close to the estimate, 9. The answer is reasonable = Add the whole numbers. = Write as Adding and Subtracting Mixed Numbers