Lesson-1-Properties-of-Addition (1).pptx

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1. Tr. Dhen Second Quarter

2. Objectives: Illustrate the properties of addition ( order , grouping , identity) and apply each in appropriate and relevant situations

3. Lesson 1: Properties of Addition

4. Let Us Remember The order property of addition means changing the order of the addends does not change the sum. The grouping property of addition tells that changing the grouping of the addends does not change the sum. The identity property of addition means adding zero to a number does not change the sum. The answer is still the number itself.

5. Understanding the Concepts of Addition Properties of Addition

6. When you combine two or more numbers or quantities, you are using addition. There are two parts of an addition sentence. 13 + 17= 30 addends sum or 13 + 17 30 addends sum Vertical way Horizontal way

7. 3 Properties Of Addition Order Property Grouping Property Changing the grouping of the addends does not affect the sum Identity Property When a number is added to zero , the sum is the number itself Changing the position or the order of the addends does not affect the sum

8. To Find The Sum 48 + 47 or 47 + 48 95 12 + 17 = 17 + 12 29 95 29 Order Property Of Addition

9. Order Property Of Addition Changing the position or the order of the addends does not affect the sum 33 + 32 32 + 33 65 = 65 =

10. 44 + 15 + 42 44 + 15 + 42 44 + 15 + 42 59 + 42 = 101 44 + 57 = 101 Grouping Property Addition ( ) ( ) Changing the grouping of the addends does not affect the sum

11. Identity Property Of Addition When a number is added to zero , the sum is the number itself 100 + 0 = 100 0 + 100 = 100 48 + 0 = 48 0 + 48 = 48

12. 13 + 9 + 19 ( ) 13 + 9 + 19 ( ) Grouping property 25 + 12 =12 + 25 0 + 800 = Grouping property Order property Identity property Order property Identity property

13. Grouping property Order property Identity property 58 + _____= 58 19 + 68 =____+ 19 Identity property 68 Order property (74 + 15) + 5 = 74 + (_____+ 5) 15 Grouping property

14. Practice Exercises: Please get your whiteboard and marker!

15. Property Of Addition Shown 355 + 66 = 66 + 355 199 + 0 = 199 Grouping property Order property Identity property Order property Identity property (31 + 20) + 11 = 31 + (20 + 11) Grouping property

16. Property Of Addition Shown 0 + 230 = 230 (93 + 30) + 15 = 93 + (30 + 15) 73 + 10 = 10 + 73 Grouping property Order property Identity property Identity property Grouping property Order property

17. Grouping property Order property Identity property 258 + _____= 258 199 + 78 =____+ 199 Identity property 78 Order property (77 + 68) + 5 = 77 + (_____+ 5) 68 Grouping property ____+ 344 = 344 Identity property

18. Grouping property Order property Identity property 7+ (6 + 3) = (7 + 6) +____ 3 Grouping property 75 + _____= 75 Identity property 10 + 6 = _____+ 6 10 Order property (39 + 12) + 9 = 39 + (12 + _____) 9 Grouping property

19. Grouping property Order property Identity property ____+ 0 = 45 45 Identity property (11 + 8) + 2 = 11 + (8 + ____) 2 Grouping property 31 + 0 = ___ 31 Identity property 15 + 7 = _____+ 7 15 Order property

20. Mathematics Activity: Get Ready page 79 (1-8) Work Alone page 80 (16-22) Work Together page 79, 80 (9-15)