1. Even and Odd Numbers Lesson 2 Saxon Math 6/5

2. By the end of this lesson, you will know how to…  Even and Odd Numbers Decide if a whole number is even or odd Find half of an even number Find half of an odd number

3. Facts Practice  100 Addition Facts

4. Mental Math  6 + 6  60 + 60  600 + 600  60 + 70  70 + 80  90 + 90  300 + 300 + 300  50+ 50 + 50 + 50

5. Problem Solving  How many two-digit counting numbers are there?  Answer: 90 Starts at 10 and goes through 99

6. Even and Odd Numbers  Whole numbers - counting numbers and zero 0, 1, 2, 3, 4, 5, 6, …  Counting by twos, we say… 2, 4, 6, 8, 10, 12, 14, …  Special sequence - even numbers  Other examples… 36, 756 and 148,567,896,094

7. Even and Odd Numbers  How can you tell? If last digit is even, then the number is even. Ends with 0, 2, 4, 6 or 8  If not even, then odd Count by twos, starting with one 1, 3, 5, 7, 9, …

8. Example 1  Which of these numbers is even? 358623452223  Solution: Look at the last digit of each 6 is even; and 5 and 3 are odd So 3586 is the only even number

9. Example 2  Which of these numbers is not odd? 123,456654,321353,535  Solution: Look at the last digit of each 6 is even; and 1 and 5 are odd So 123,456 is the only number that is not odd

10. Dividing Numbers in Half  Sherry has 6 cookies to share with Leticia. If she shares them equally, how many will each girl have?

11. Dividing Numbers in Half  Herman - Herman has 5 cookies to share with Ivan. If he shares them equally, how many will each boy have?

12. Activity: Halves 12345678910 ½11 ½22 ½33 ½44 ½5 11121314151617181920