1. Everyday Math 2 nd Grade Unit 2 Lesson 4 Turn Around Facts & the +9 Shortcut I can review the turn around shortcut for addition. I can discover and practice a shortcut for +9 addition facts.

2. Mental Math & Reflexes Find the distance between numbers using the number grid. *24 to 44 *13 to 53 **26 to 47 **15 to 59 ***85 to 56 ***103 to 54

3. Mental Math & Reflexes Find the distance between numbers using the number grid. *24 to 44 20 *13 to 53 40 **26 to 47 21 **15 to 59 44 ***85 to 56 29 ***103 to 54 54

4. Math Message Find the sums. Look for patterns. 1.1+6= ? 2.6+1= ? 3.? =3+5 4.? =5+3 5.8+2= ? 6.2+8= ?

5. Math Message Follow- Up What are turn around facts? Compare and contrast turn around facts. Is "turn around facts" a good name for these math facts? Why or why not? Are there any facts that aren't turn around facts? How can the turn around facts shortcut help you gain fact power?

6. Home Link 2.3 Follow- Up Review HL 2.3 Doubles Facts What patterns did you notice about the sums of the doubles facts? How did you solve the "almost doubles" facts in problem 3?

7. Vocabulary 1.Turn around facts 2.+9 facts 3.+9 shortcut

8. Vocabulary turn-around facts A pair of addition facts in which the order of the addends is reversed. For example, 4 + 5 = 9 and 5 + 4 = 9 are turn- around addition facts. There are no turn-around facts for subtraction or division. +9 fact The sum of two 1-digit numbers when one of the addends is 9, as in 9 + 5 = 14. +9 shortcut Add 10, then count back 1.

9. Teaching the Lesson  Introducing the +9 Shortcut o +9 shortcut: add 10, count back 1 o Check pattern on the Facts Table o Alternate number sentence forms  Practicing +9 Facts o Math Journal p. 31 O Review Answers and write number story

10. Ongoing Learning and Practice Playing Beat the Calculator o Math Journal p. 24 Fact Power Table

11. HOT Questions 1. How might you describe the +9 patterns on the Facts Table? 2. Give an example of a + 9 fact. How might you use the + 9 shortcut to find the sum? 3. What other shortcuts in mathematics do you know?

12. Math Boxes 2.4 Home Links 2.4 Math Minute p. 24, 80 Demonstrating the +9 shortcut with Frames and Counters Assessment