Lesson 3 – Sum And Difference Of Even And Odd Numbers

OBJECTIVE:

At the end of this lesson, students should be able to determine the sum and difference of odd and even numbers.

A number is either odd or even. We will learn about the results of adding and subtracting numbers.

SUM (ADDITION)

1. 1. Odd + Odd = even

e.g.    3 + 5 = 8

1. 1. Odd + Even = Odd

e.g.    3 + 4 = 7

1. 1. Even + Odd = Odd

e.g.    4 + 3 = 7

1. 1. Even + Even = Even

e.g.   2 + 6 = 8

SUBTRACTION (DIFFERENCE)

1) Odd – Odd = Even

e.g.   9 – 7 = 2

2) Even – Even = Even

e.g.   8 – 4 = 4

3) Even – Odd = Odd

e.g.    10 – 5 = 5

4) Odd – Even = Odd

e.g.    5 – 2 = 3