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Properties of Addition Day 1

Properties of Addition Day 1. Properties. Today you are going to learn three properties of addition . Properties of addition are rules that you follow when you add. When you solve these 4 problems, you use the zero property of addition. 1) Zero Property of Addition:. 7+ 0 =7 0 +99=99

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Properties of Addition Day 1

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  1. Properties of AdditionDay 1

  2. Properties • Today you are going to learn three properties of addition. Properties of addition are rules that you follow when you add.

  3. When you solve these 4 problems, you use the zero property of addition. 1) Zero Property of Addition: 7+0=7 0+99=99 56+0=56 12+0=12 When you add zero to a number, the sum is that number.

  4. Please write the Zero Property of Addition in your notes. 1.) Zero Property of Addition: When you add zero to a number, the sum is that number. Examples: 0+19= 192,567+0= 2,567

  5. When you solve these problems, you use the Commutative Property of Addition. 2) Commutative Property of Addition: 7+5=12 5+7=12 34+99 = 99+34 100+27 = 127 27 +100=127 When you change the order of the addends the sum stays the same.

  6. Please write the Commutative Property of Addition in your notes. 2.) Commutative Property of Addition: When you change the order of the addends, the sum stays the same. Example: 5+7=127+5=12

  7. Practice: Which property is being used to solve these problems? 0 + 7 = 7 ________________________ 7 + 9 = 9 + 7 ______________________ 12+99=99+12 ______________________ 0 + 5,012,456= 5,012,456 _____________ Zero Property of Addition Commutative Property of Addition Commutative Property of Addition Zero Property of Addition

  8. When you solve this problem, you use the Associative Property of Addition. 3) Associative Property of Addition: *Remember: Add the numbers in the parentheses FIRST. 12 + (2 + 5) = (12 + 2) + 5 12 + 7 14 + 5 = 19 19 When you change the way addends are grouped, the sum stays the same.

  9. The associative property helps with mental math. Use the associative property to solve these problems mentally. 75 + 25 + 46 = __________________ 92 + 421 + 8 = __________________ 422 +345 + 78 = __________________ 146 *Which two numbers did you add first? Why? 521 *Which two numbers did you add first? Why? 845 *Which two numbers did you add first? Why?

  10. Please write the Associative Property of Addition in your notes. 3.) Associative Property of Addition: When you change the way the addends are grouped, the sum stays the same. Example: (3+7)+10 = 20 3 + (7+10) = 20

  11. Practice: Which property is being used to solve these problems? 0 + 29 = 29 ________________________ 17 + 19 = 19 + 17 ______________________ 12+(99+3) = 12 + (99+3) ______________________ 6 + (7 + 19) + 8 = (6 +7) + 19 + 8 _____________________ Zero Property of Addition Commutative Property of Addition Associative Property of Addition Associative Property of Addition

  12. Homework • Complete Homework worksheet 3.1

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