Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Like this presentation? Why not share!

405 views

369 views

369 views

Published on

No Downloads

Total views

405

On SlideShare

0

From Embeds

0

Number of Embeds

28

Shares

0

Downloads

11

Comments

0

Likes

1

No embeds

No notes for slide

- 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)
- 7. <ul><li>Sally ate ⅛ of cake and her sister ate ⅜ of it. What fraction did they eat altogether? </li></ul><ul><li>Arif mowed 3/10 of the lawn and Tina mowed 5/10 of the lawn. How much of the lawn has been mowed? </li></ul>
- 8. <ul><li>3. 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? </li></ul><ul><li>Jill studied math for 2 3/4 hours and Spanish for 1 2/3 hours. What was her total study time? </li></ul>
- 9. <ul><li>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? </li></ul><ul><li>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? </li></ul>
- 10. <ul><li>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? </li></ul><ul><li>There are seven 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? </li></ul>
- 11. <ul><li>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? </li></ul><ul><li>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? </li></ul>
- 12. <ul><li>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? </li></ul><ul><li>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? </li></ul>

No public clipboards found for this slide

×
### Save the most important slides with Clipping

Clipping is a handy way to collect and organize the most important slides from a presentation. You can keep your great finds in clipboards organized around topics.

Be the first to comment