Transcript L002 - MrsBogansClass

Even and Odd Numbers
Lesson 2
Saxon Math 6/5
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
Facts Practice
 100 Addition Facts
Mental Math
6 + 6
60 + 70
60 + 60
70 + 80
600 + 600 90 + 90
300 + 300 + 300
50+ 50 + 50 + 50
Problem Solving
 How many two-digit counting
numbers are there?
 Answer: 90
 Starts at 10 and goes through 99
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
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, …
Example 1
 Which of these numbers is even?
3586
2345
2223
 Solution:
 Look at the last digit of each
 6 is even; and 5 and 3 are odd
 So 3586 is the only even number
Example 2
 Which of these numbers is not
odd?
123,456
654,321
353,535
 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
Dividing Numbers in Half
 Sherry has 6 cookies to share with
Leticia. If she shares them equally,
how many will each girl have?
Dividing Numbers in Half
 Herman - Herman has 5 cookies to
share with Ivan. If he shares them
equally, how many will each boy
have?
Activity: Halves
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½
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1½
2
2½
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3½
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4½
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