Lesson-2-Addition-Without-Regrouping.pptx

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1. Third Quarter Tr. Dhen

2. Objectives: Visualize and add two to three one-digit numbers horizontally and vertically

3. Grouping Property Changing the grouping of the addends does not affect the sum.

4. Add the numbers. Write the correct answer. ( ) 6 + 4 + 9 10 + 9 = 19 ( ) 6 + 2 + 5 6 + 7 = 13 ( ) 4 + 5 + 5 4 + 10 = 14

5. Lesson 2: Addition Without Regrouping

6. Let Us Remember Addition is the process of putting together In 523 + 435= 958, the addends are 523 and 435 and the sum or the total is 958 To add numbers without regrouping, simple combine the digits in the same place value.

7. Understanding addition: Addition Is a mathematical operation. It is a process of putting together or action that you do with numbers. The symbol for this process is + (plus). In this process We combine 3 numbers to make a bigger number

8. In adding three digit numbers, align the numbers on the right-hand side, then follow the steps: a. Add the ones column. b. Add the tens column. c. Add the hundreds column Example: 5 6 4 + 3 1 2 6 7 8 8 hundreds 7 tens 6 ones The sum is

9. Example#1: Add 523 + 435 Step 1: Add starting form the ones column hundreds tens ones 5 2 3 4 3 5 +_____________ 8

10. Step 2: Proceed to the tens column hundreds tens ones 5 2 3 4 3 5 +_____________ 5 8

11. Step 3: Lastly, end with the hundreds column hundreds tens ones 5 2 3 4 3 5 +_____________ 9 5 8 The sum is 958

12. Example#2: Ms. Flores has 136 candies and 52 biscuits as prizes for her pupils. How many prizes does Ms. Flores have altogether? 1 3 6 + 5 2 8 8 1

13. Example#3: Lucy went to the grocery store. She bought 357 packs of cookies and 140 packs of noodles. How many packs of groceries did she buy in all? 3 5 7 + 1 4 0 7 9 4

14. 5 8 + 1 1 9 6 3 1 3 + 5 6 4 7 7 8

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

16. 2 3 + 5 5 8 7 Add the ones, and tens, . 1 3 + 4 6 9 5 6 2 + 3 4 6 9 8 8 + 1 1 9 9 3 4 + 4 2 6 7

17. Add the ones, tens, and hundreds. 2 1 5 + 4 1 3 8 2 6 3 4 8 + 2 1 1 9 5 5 2 0 3 + 5 6 4 7 6 7

18. Add the ones, tens, and hundreds. 6 4 2 + 2 2 3 5 6 8 8 3 3 + 1 6 4 7 9 9

19. Mathematics Activity: Work together page 151 (7-14) Get Ready/Work Together page 150-151 (1-6) Work Alone page 152 (15-20)