New PPTX Presentation - Copy_112001.pptx

Mathematics revision on prima 2

1. Revision on Prime 2

2. Defined the places Start from the ones (add ones with ones) Add tens with tens` Example: To add any two - digit numbers we should do : 1 5 4 O T 1 9 5 3 2 4 O T 9 5 6 3 6 1 O T 7 9

3. 4 2 6 9 O T 3 Exercises: 1 9 5 1 5 6 O T 1 1 7 2 1 8 9 O T 1 1 10 5 2 7 5 O T 1 9 7 7 3 3 O T 1 11

4. 8 5 2 2 2 7 Exercises: 1 8 O T H 9 9 6 2 1 5 5 1 9 O T H 10 2 6 7 5 3 4 7 1 3 O T H 8

5. Defined the places Start from the ones (subtract ones with ones) subtract tens with tens Example: To subtract any two - digit numbers we should do : 1 5 6 O T 1 1 9 2 3 4 O T 5 1 6 1 6 1 O T 5 5

6. If we subtract two digit numbers and the ones for the first number is smaller than the ones of the second number we use regrouping by borrow 1 from the next place (tens) We can’t subtract 5 from 3 because 3 is smaller than 5 so we will take 1 from 4 and put it in ones to be 13 To subtract any two - digit numbers we should do : 3 2 4 5 O T 8 Example: 3 1 13

7. Exercises: 4 2 6 9 O T 5 5 3 1 4 1 1 4 5 O T 6 3 2 1 1 3 4 7 8 O T 5 6 2 13 3 4 5 O T 8 3 1

8. 2 5 8 8 2 7 4 Exercises: 7 2 O T H 5 12 5 5 9 7 3 6 8 8 3 O T H 3 15 8 5 2 2 2 7 6 6 7 O T H 4 12

9. 3 8 8 1 7 2 Exercises: 7 4 O T H 6 10 5 7 3 6 3 10 4 O T H 2 10 5 9 2 1 5 8 9 10 7 O T H 2 10 7 9

10. 1 2 3 4 H O 279 185 400 60 200 20 2 600 7 < < > >

11. 4 5 5 6 587 611   

12. 1 2 3 7 3 10 18 10 8 15 6 9 5 7 6 6 6

13. Thank you