010 lesson 2

Lesson 2 PROPERTIES OF ADDITION Objectives: After this lesson, the students are expected to: define the properties of addition; use the different properties of addition in solving; perform an operation using the properties of addition. PROPERTIES OF ADDITION ,[object Object],Examples: 8 + 0 = 827 + 0 = 27 10 + 0 = 1031 + 0 = 31 ,[object Object],This property states that changing the order of the addends does not change the sum. This means you need to remember only half of the basic facts. In symbols, the property says that a + b = b + a, for any numbers a and b.: Examples: 6 + 8 = 148 + 6 = 14 11 + 27 = 38 27 + 11 = 3 ,[object Object],Examples: (4 + 3) + 8 = 4 + (3 = 8) = 15 9 + (8 + 6) = (9 + 8) + 6 = 23 Remember to work in the parenthesis first. Summary:The 0 Property in AdditionIf “a” is any number, a + 0 = a.The Commutative Property of AdditionIf a + b = b + a, for any numbers a and b.The Associative Property of AdditionIf a, b and c are any numbers,(a + b) = c = a + (b + c). -490928-466727WORKSHEET NO. 2 NAME: ___________________________________DATE: _____________ 433070227330YEAR & SECTION: ________________________RATING: ___________ ,[object Object],1. 265 + 547 = 547 + 265___________________________ 2. 85 + 78 = 78 + 85_______________________________ -42195753982643. 15 + 0 = 15____________________________________ 4. 3 + (5 + 9) = (3 + 5) + 9 =17_____________________ 5. 31+ (21+15) = (31+21) +15 = 67__________________ 6. 59 + 0 = 59___________________________________ 7. 100 + 0 = 100_________________________________ 8. 65 + 498 = 498 + 65____________________________ 9. 9 + 5 = 5 + 9__________________________________ 10. (10+10) + 10 = 10+ (10+10) =30_________________

010 lesson 2

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010 lesson 2