Family ch22
- 1. HARCOURT MATH Name GRADE 4 Date Chapter 22 WHAT WE ARE LEARNING Dear Family, Add and Subtract Fractions Your child is learning how to add and subtract like and Mixed Numbers and unlike fractions and mixed numbers. To help your child visualize the fractions, we are using fraction bars. VOCABULARY Here are some examples of what is being taught: Here are the vocabulary Adding and Subtracting Like Fractions words we use in class: 3 7 1 Like fractions Like 10 10 1 2 fractions are fractions with 10 10 the same denominator. 4 , or 2 5 1 5 1 , or 1 10 10 2 Unlike fractions Unlike Add or subtract the numerators. fractions are fractions with different denominators. Adding and Subtracting Unlike Fractions Add. 1 1 3 4 STEP 1 STEP 2 To add unlike fractions, first Find the like fraction bars that look at the denominators. fit exactly under 1 and 1 . 3 4 1 1 1 1 1 1 1 3 3 3 3 4 1 1 1 1 4 4 4 4 ? STEP 3 Add the like fractions. So, 1 3 1 4 7 12 . 1 1 1 3 4 1 1 1 1 1 1 1 12 12 12 12 12 12 12 When you subtract unlike fractions, you first find equivalent fractions with like denominators. Then, © Harcourt subtract the numerators. Included with these pages are fraction bars for you and your child to cut out and use for the practice exercises and the riddle game. Sincerely, Family Involvement Activities FA85
- 2. Equivalent Fractions HOME ACTIVITY Here are some fraction bars to cut out and use for the activities. For durability, glue the strips onto light cardboard. 1. Use the fraction bars to find all of the fractions equivalent to 1 . 2 2. Use the fraction bars to find all of the fractions equivalent to 2 . 3 3. Use the fraction bars to find all of the fractions equivalent to 3 . 4 1 1 2 2 1 1 1 3 3 3 1 1 1 1 4 4 4 4 1 1 1 1 1 1 6 6 6 6 6 6 1 1 1 1 1 1 1 1 8 8 8 8 8 8 8 8 1 1 1 1 1 1 1 1 1 1 1 1 12 12 12 12 12 12 12 12 12 12 12 12 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 © Harcourt 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 Answers: 1. 4 , 6 , 8 , 12 , 16 ; 2. 6 , 12 , 15 ; 3. 8 , 12 , 16 12 9 6 10 8 4 8 6 2 3 4 FA86 Family Involvement Activities
- 3. PRACTICE/HOMEWORK Name _________________________ Add and Subtract Fractions and Mixed Numbers Find the sum. 3 2 1 1 3 2 1. 4 4 2. 3 3 3. 8 8 Compare. Write , , or in each circle. 1 1 1 4 4 4 5 3 4. 3 3 4 5. 10 10 5 6. 6 6 2 Find the difference. 6 3 7 3 7 1 7. 8 8 8. 12 12 9. 3 3 Find the sum or difference. 10. 41 4 11. 51 3 12. 6 5 12 13. 32 3 31 4 21 3 3 4 12 11 3 Find the sum or difference. Use fraction bars or draw pictures to help you. 1 2 3 7 14. 3 15. 5 16. 6 17. 8 2 1 2 3 4 3 12 4 © Harcourt 2 5 4 4 18. 3 19. 6 20. 5 21. 8 1 1 2 1 9 3 10 2 14. 12 , or 6 ; 15. 15 ; 16. 12 , or 3 ; 17. 8 ; 18. 9 ; 19. 6 , or 2 ; 20. 10 , or 1; 21. 0 10 1 3 7 1 2 8 1 5 10 ; 7. 8 ; 8. 12 , or 3 ; 9. 3 , or 2; 10. 7 4 , or 7 2 ; 11. 3; 12. 9 12 , or 9 4 ; 13. 2 3 ; ; 6. ; 5. Answers: 1. 4 , or 1 4 ; 2. 3 ; 3. 8 ; 4. 1 3 9 1 2 6 1 4 3 5 2 1 5 Family Involvement Activities FA87
- 4. MATH GAME Here’s a riddle: Why is the moon like a dollar? To solve it, circle the fraction in each row that is not equivalent to the others in that row. Write its letter above its row number on the blanks at the bottom of the page. Use the fraction bars from the Home Activity for help. 2 4 7 10 1 3 B 6 C R N 6 15 1 4 6 2 2 4 D 16 E G Q 24 10 2 3 4 1 3 16 V 15 F X M 32 8 8 6 10 3 4 12 P 9 Z L O 15 10 1 4 6 3 5 3 A 8 N C X 12 6 2 9 6 12 6 5 U 12 Y J K 8 16 4 2 4 8 7 9 T 3 P S F 6 12 4 1 4 3 8 20 U 5 L E B 10 15 1 4 3 3 9 3 Z 12 T G S 9 6 © Harcourt Answer: It has ____ ____ ____ _____ ____ ____ ____ ____ ____ ____ ____ ____. 3 4 6 1 2 6 5 1 7 8 1 9 Answer: four quarters FA88 Family Involvement Activities