4. MATH W-7.pptx for grade 2 gmrc to learn

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1. Mathematics 2

2. PROPERTIES OF ADDITION

3. There are 3 properties of Addition:

4. Commutative Property Associative Property Identity Property

5. What is Commutative Property of Addition?

6. The word commutative comes from the verb “to commute”. Commutative Property

7. Commuting means changing, replacing, or exchanging Commutative Property

8. The digits change their order, but the answer stays the same! Commutative Property

9. A + B = B + A Commutative Property

10. Commutative Property 2 + 3 = 5 3 + 2 = 5

11. Commutative Property 66 + 11 = 77 11 + 66 = 77

12. What is Associative Property of Addition?

13. To associate means to group numbers together . Associative Property

14. In math, we use parenthesis to show groups. Associative Property

15. In the order of operations, a lways do the problem or number in the parenthesis FIRST! Associative Property

16. The digits stay the same, but are grouped together differently. Associative Property

17. The digits are grouped together differently. BUT… • The answer is always the same! Associative Property

18. (A + B)+ C = A + (B + C) Associative Property

19. 850 + (1 + 10) = 861 ( 850 + 1) + 10 = 861 Associative Property

20. (3+5) + 6 = 14 3+(5 + 6) = 14 Associative Property

21. What is Identity Property of Addition?

22. I am me! You cannot change My identity! Identity Property

23. What do you think is this number that when you add it to a number it will not change its value? Identity Property

24. When you add a zero to any number, the sum is that same as that number. Identity Property

25. Identity Property

26. Identity Property

27. Zero is the only number you can add to something and see no  change. Identity Property

28. A + 0 = A Identity Property

29. 234 + 0 = 234 Identity Property

30. Let us Practice!!!

31. Directions: Write CP if it is Commutative property, AP if it is Associative Property, IP if it Identity Property.

32. Mathematics 2