1. Copyright © Ed2Net Learning, Inc.1 Addition Grade 2

2. Copyright © Ed2Net Learning, Inc. 2 Welcome Hello! How are you today. Lets start a new Lesson !

3. Copyright © Ed2Net Learning, Inc. 3 Recap In the last chapter, we learned how to add numbers to find the sum. The numbers you add are called addends. When you add zero to any number, the sum is the number itself. You can change the order of the addends, but the sum remains the same. When you count on to add on a number line, start with the greater addend.

4. Copyright © Ed2Net Learning, Inc. 4 Try this!! 3 + 3 = 6 I add doubles when I add 3+3

5. Copyright © Ed2Net Learning, Inc. 5 Doubles When the two addends are same, we consider it to be double. In this lesson, we will learn that doubles are copies of another number. You can use Doubles to help you add or subtract. 2 + 2 = 4

6. Copyright © Ed2Net Learning, Inc. 6 Doubles  You can use doubles to find a sum.  Example 4 + 4 = 8 doubles

7. Copyright © Ed2Net Learning, Inc. 7 Doubles and adding 10 Use 10 to add Now, lets use make-a-ten strategy to simplify our addition. Add 9 + 3 10 + 2 = 12 9 + 3 =12 is the same as 10 + 2 =12 Make a ten and have 2 ones

8. Copyright © Ed2Net Learning, Inc. 8 Adding 10 Example How would you add 9 + 4? 9 + 4 10 + 3 First make a ten. There are 3 extra so add 10 + 3 = 13.

9. Copyright © Ed2Net Learning, Inc. 9 Adding 10 Why making a ten helps in addition? Making a ten help us to add because adding a number to 10 is often easier than adding to other numbers. Make a ten to simplify Addition.

10. Copyright © Ed2Net Learning, Inc. 10 Something to remember!! When the two addends are same, we consider it to be double. Doubles help us to add or subtract. Making a ten help us to add quickly and easily.

11. Copyright © Ed2Net Learning, Inc. 11 Practice Find the sum. 1. 5 + 5 = __ 2. 7 + 7 = __ 3. 3 + 3 = __

12. Copyright © Ed2Net Learning, Inc. 12 Practice Write a double fact that has a sum of 10.

13. Copyright © Ed2Net Learning, Inc. 13 Practice Rosie saw 3 balloons in the sky. Pete also saw the same number of balloons flying in the sky. How many balloons did they see in all?

14. Copyright © Ed2Net Learning, Inc. 14 Practice There are 8 apples in the fruit basket. Write a double fact that has a sum of 8.

15. Copyright © Ed2Net Learning, Inc. 15 Practice Add 6 + 6 = ___ 7 + 7 = ___

16. Copyright © Ed2Net Learning, Inc. 16 Practice How much is 8 + 7? Explain your steps.

17. Copyright © Ed2Net Learning, Inc. 17 Practice Tim finds 5 stones in the playground. He finds 6 more. How many stones does he finds in all? Tell how do you use 10 to solve the problem?

18. Copyright © Ed2Net Learning, Inc. 18 Practice 9 children are playing in the garden. 5 more joined them. How many children are in total?

19. Copyright © Ed2Net Learning, Inc. 19 Practice Tina bought 7 small cartons of juice for her party. She buys 7 more next day. Are the juice cartons enough for 13 friends attending the party?

20. Copyright © Ed2Net Learning, Inc. 20 Break!!

21. Copyright © Ed2Net Learning, Inc. 21

22. Copyright © Ed2Net Learning, Inc. 22 Assessment 1. Find the sum. 1. 8 + 8 = __ 2. 7 + 7 = __ 3. 3 + 3 = __

23. Copyright © Ed2Net Learning, Inc. 23 Assessment 2. What is the sum of 6 +7? How do you know?

24. Copyright © Ed2Net Learning, Inc. 24 Assessment 3. Write a double fact that has a sum of 20?

25. Copyright © Ed2Net Learning, Inc. 25 Assessment 4. Four people can sit on one table. How many people can sit on two tables?

26. Copyright © Ed2Net Learning, Inc. 26 Assessment 5. Explain how making a ten helps in addition.

27. Copyright © Ed2Net Learning, Inc. 27 Assessment 6. Find the sum by making a ten. 1. 9 + 9 2. 8 + 6

28. Copyright © Ed2Net Learning, Inc. 28 Assessment 7. Tom has 8 candies and Elle has 9 lollipops. How many sweets they have in all? 8 candies 9 lollypops

29. Copyright © Ed2Net Learning, Inc. 29 Assessment 8. Fiona bought 5 cupcakes. She likes it so much that she bought the same number of cakes again. How many cakes did she buys all together?

30. Copyright © Ed2Net Learning, Inc. 30 Assessment 9. Find the sum. 1. 8 + 7 = __ 2. 9 + 9 = __ 3. 3 + 8 = __

31. Copyright © Ed2Net Learning, Inc. 31 Assessment 10. Rachael made a tower with 7 blocks and added 6 more blocks to make the tower higher. How many blocks did she use?

32. Copyright © Ed2Net Learning, Inc. 32 Recap When the two addends are same, we consider it to be double. Doubles help us to add or subtract. Making a ten help us to add quickly and easily. It is easier to add a number to 10 than to add with other numbers.

33. Copyright © Ed2Net Learning, Inc. 33 Excellent work!! Now practice your worksheets to learn more about doubles and adding 10. All the best.