2. 1 st Grade Marisa Ladikos Click to Start

3. Definitions Addition: Adding one set of numbers to another set of numbers to get one whole group. Sum: “whole” or the “answer” to an addition problem Plus sign: “+” Equals sign: “=“ Next

4. Example of Story Problem Olivia has 3 puppies. Marisa has 2 puppies. They decide to take them on a walk. How many puppies do Olivia and Marisa have on their walk? Next

5. Number Sentences Next

6. Question 1 Kristen has 5 cookies and Marisa has 3 cookies. How many cookies do Marisa and Kristen have? 8 8 3 3 5 5 4 4

7. Right! Next Question Next Question Kristen and Marisa have 8 cookies

8. Wrong Answer Kristen has 5 cookies Try Again Marisa has 3 cookies Count how many cookies both Kristen AND Marisa have in ALL…

9. Question 2 Jenna’s chicken lays 1 egg. Kyle’s chicken lays 5 eggs. What is the correct number sentence? 1 + 5 = 6 2 + 5 = 7 2 + 4 = 6 1 + 1 = 2

10. Correct! 1 + 5 = 6 because Jenna’s chicken laid 1 egg and Kyle’s chicken laid 5 eggs. + Next

11. Incorrect! Look carefully at how many eggs Jenna’s chicken lays and how many Kyle’s chicken lays…. Try Again!

12. Conclusion Play Again Next Addition is putting two sets of numbers together to make one whole group.

13. Reference http://www.aaaknow.com/grade1.htm#topic54 The End