# Challenge Exercises: Adding and Subtracting Fractions and Mixed Numbers

Directions: Perform the necessary operation(s) in each exercise below. Be sure to simplify your result, if necessary. Click once in an ANSWER BOX and type in your answer; then click ENTER. After you click ENTER, a message will appear in the RESULTS BOX to indicate whether your answer is correct or incorrect. To start over, click CLEAR.

Note: To write the fraction three-fourths, enter 3/4 into the form. To write the mixed number four and two-thirds, enter 4, a space, and then 2/3 into the form.

 1. ANSWER BOX:    RESULTS BOX:
 2. ANSWER BOX:    RESULTS BOX:
 3. ANSWER BOX:    RESULTS BOX:
 4. A cafe sold 9 and 1/3 liters of caffeinated coffee and 8 and 2/3 liters of decaffeinated coffee. How many liters of coffee did the cafe sell in all? ANSWER BOX:  liters    RESULTS BOX:
 5. A seamstress cut 6 and 5/12 inches from a skirt and 4 and 11/12 inches from a pair of pants. How much more did the seamstress cut from the skirt than the pants? ANSWER BOX:  in    RESULTS BOX:
 6. A bake shop bought 6 7/8 pounds of white flour and 1 3/8 pounds of whole wheat flour. How many pounds of flour did the bake shop buy in all? ANSWER BOX:  lbs    RESULTS BOX:
 7. ANSWER BOX:    RESULTS BOX:
 8. A builder placed an order for 14 and 7/12 tons of dirt. He calculates that he will require 10 and 3/4 tons of dirt for a job. How much dirt will the builder have left for his other jobs? ANSWER BOX:   tons   RESULTS BOX:
 9. Joanne made 9 bags of popcorn, of which her friends ate 4 and 5/8 bags. How much popcorn was left? ANSWER BOX:  liters    RESULTS BOX:
 10. Sam's milkshake recipe calls for 16 and 3/14 scoops of ice cream and Heidi's recipe calls for 9 and 7/10 scoops. How many more scoops of ice cream are used in Sam's recipe than in Heidi's recipe? ANSWER BOX:  scoops    RESULTS BOX:
 Lessons on Adding and Subtracting Fractions and Mixed Numbers 1. Adding Fractions with Like Denominators 2. Subtracting Fractions with Like Denominators 3. Adding and Subtracting Fractions with Unlike Denominators 4. Adding Mixed Numbers 5. Subtracting Mixed Numbers 6. Solving Word Problems 7. Practice Exercises 8. Challenge Exercises 9. Solutions