Addition without regrouping second quarter.pptx

Addition without regrouping is the process of performing the addition of two numbers corresponding to their place values without taking into consideration the rearrangement of numbers.

1. Unit 2 – Chapter 3 Addition of whole numbers LESSON 2: Addition without Regrouping

2. Review What is Addition? What is Addends? What is Sum? What sign to use in addition? What are the three properties of addition?

3. Three properties of Addition Commutative Property of Addition Ex: 1 + 9 = 9 + 1 10 = 10 2. Associative Property of Addition Ex:(7 + 3) + 6 = 7 + (3 + 6) 10 + 6 = 7 + 9 16 = 16 3. Identity Property of Addition Ex:8 + 0 = 8

4. Addition without regrouping 2 ways to add Expanded Form Adding Vertically

5. Expanded form Look first for the place value of the number. (hundreds, tens, and ones) Ex: 1. 54 = 50 + 4 2. 134 = 100 + 30 + 4 +21 = 20 + 1 + 232 = 200 + 30 + 2 = 70 + 5 = 75 = 300 + 60 + 6 = 366

6. Adding vertically Align the digits when adding vertically. Make sure toad digits with the same place value. Ex: 120 24 54 + 35 + 52 + 21 155 76 75

7. Asynchronous task Answer on your Math book Skill Booster, page 81 to 82 letter A only.