1. Whole Numbers
Addition and Subtraction
What will we learn today?
• Solving 1-step word problems
involving addition and subtraction

2. Here’s an example.

3. Here’s an example.
You have 2 toy cars. I give you 3 more toy
cars. How many toy cars do you have now?
+ =

4. Here’s an example.
You have 2 toy cars. I give you 3 more toy
cars. How many toy cars do you have now?
+ =
2 + 3 = 5

5. Here’s an example.
You have 2 toy cars. I give you 3 more toy
cars. How many toy cars do you have now?
+ =
2 + 3 = 5
3 more than 2 is 5.
You have 5 toy cars now.

6. Here’s another example.
By using the count-on method,
you can easily find the answers

7. Here’s another example.
5 squares
By using the count-on method,
you can easily find the answers

8. Here’s another example.
5 squares
By using the count-on method,
you can easily find the answers

9. Here’s another example.
5 squares
By using the count-on method,
you can easily find the answers
6
+1

10. Here’s another example.
5 squares
By using the count-on method,
you can easily find the answers
6 7
+1 +1

11. Here’s another example.
5 squares
By using the count-on method,
you can easily find the answers
6 7 8
+1 +1 +1

12. Here’s another example.
5 squares
By using the count-on method,
you can easily find the answers
5 + 3 = 8

13. Let’s try another question together.

14. Let’s try another question together.
Jimmy has 13 books.
His brother gives him 6 more books.
How many books did Jimmy have now?
13

15. Let’s try another question together.
Jimmy has 13 books.
His brother gives him 6 more books.
How many books did Jimmy have now?
13
14 15 Using count-on method
+1

16. Let’s try another question together.
Jimmy has 13 books.
His brother gives him 6 more books.
How many books did Jimmy have now?
13
14 15 16 Using count-on method
+1 +1

17. Let’s try another question together.
Jimmy has 13 books.
His brother gives him 6 more books.
How many books did Jimmy have now?
13
14 15 16 17 Using count-on method
+1 +1 +1

18. Let’s try another question together.
Jimmy has 13 books.
His brother gives him 6 more books.
How many books did Jimmy have now?
13
14 15 16 17 18 Using count-on method
+1 +1 +1 +1

19. Let’s try another question together.
Jimmy has 13 books.
His brother gives him 6 more books.
How many books did Jimmy have now?
13
14 15 16 17 18 19 Using count-on method
+1 +1 +1 +1 +1

20. Let’s try another question together.
Jimmy has 13 books.
His brother gives him 6 more books.
How many books did Jimmy have now?
13
14 15 16 17 18 19 Using count-on method
+1 +1 +1 +1 +1 Answer: 19

21. Are you ready to
try out the
questions?