B1.2 read and represent integers, using a variety of tools and strategies, including horizontal and vertical number lines
Activity 1: Whole Numbers in Our Daily Lives
Ask students in dyads to describe a situation that a negative integer could represent, for example
-2.
Share the results with the class to identify the different possibilities. For example, I thought about the weather and owing money. I know that it is also possible to use two colours of tokens: one for negative integers and the other for positive ones.
Activity 2: Represent Whole Numbers with Tokens
Draw a number line from -10 to 10, and locate the following integers on the line: 2, -6, -8 and
7.
Source: Closing the Performance Gap, Grade 9, p. 11.
Activity 2: Represent Whole Numbers with Tokens
Which integers are shown below? (The white chips represent positive integers and the red chips represent negative
integers)
a)
b)
Solution for
a) 3
b) -8
Use tokens to represent the opposite number of each of the integers obtained in a) and b) and indicate what that number is.
Solution
Source: Closing the Performance Gap , Grade 9, p. 11.