1) The document provides notes on adding and subtracting fractions, including how to find a common denominator when the denominators are different. 2) It includes example problems for adding and subtracting fractions with the same or different denominators. 3) Students are assigned fraction word problems to solve involving adding and subtracting fractions, and must post their work and answers online.

1. MATHEMATICS YEAR 4 FRACTIONS NOTES (ADDING & SUBSTRACTING)

2. FRACTION: HOW TO ADD?? When the denominators are the same… We have a rectangle that is cut into 4 pieces... Each piece is and 2 pieces are If we add , that would be… 4 4 + = 1 4 2 4 1 2 + = 3 4

3. When the denominators are different… We need to find least common denominator (LCD) For example, The LCD for 2 and 3 is 6… Change : Change :

4. When the denominators are the same… We have a rectangle that is cut into 6 pieces... Each piece is . So, HOW TO SUBTRACT?? (5 pieces) Take away 2 pieces, So, (3 pieces are left) 1 6 5 6 - 2 6 5 6 = 5 6 - 2 6 = 3 6

5. When the denominators are different… When the denominators are different…

6. FRACTIONS TASK : PROBLEM SOLVING (ADDING & SUBSTRACTING) Instruction: Answer the problem solving questions and show the working steps. Students have to post their answers on teacher’s Wikispace, ‘mathsforfun’, at the discussion section.

7. Q1. Sally ate ⅛ of cake and her sister ate ⅜ of it. What fraction did they eat altogether? Q2. Arif mowed 3/10 of the lawn and Tina mowed 5/10 of the lawn. How much of the lawn has been mowed?

8. Q3. May planted 1/3 of her vegetable garden in the morning and another 1/3 of it in the afternoon. What fraction of her garden was planted in one day? Q4. Jill studied math for 2 3/4 hours and Spanish for 1 2/3 hours. What was her total study time?

9. Q5. Ashley made a muffin. She used 1 2/3 cups of white flour and 3 cups of whole-wheat flour. How much flour did she use in all? Q6. Sidhu had 8 dollars. He spent ⅝ of his money on candy and another ¼ of his money on soda. What fraction of his money did he spend altogether?

10. Q7. Maria collects 1 ¼ boxes of litter from the roadside. Amy collects 2 ¾ boxes. How many boxes of litter did they collect in all? Q8. There are eight pieces of pizza. Roy ate 3/8 of the pizza for dinner. He ate 3/8 of the pizza for a bedtime snack. How much of the pizza is left?

11. Q9. Miss Lee brought 4 4/5 pounds of candy to school. The students in third grade ate 2 ½ pounds of the candy. How much did Miss Lee have left? Q10. A plumber needs 8 ¾ metres of pipe to repair a water line. He has only 4 ½ metres of pipe. How many more metres of pipe does he need?

12. Q11. Adam bought 2 1/5 pounds ground beef. His mother used 1 3/5 pounds to make hamburgers. How much of the ground beef was left? Q12. All of William's school books weigh a total of 5 1/2 kilograms. If he take away his math book, the total weight drops to 2 1/2 kilograms. How much does William's math book weigh?