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 to work in pairs to describe a situation that a negative integer could represent, for example - 2.
Have pairs share their results with the class to identify different possibilities. For example, I thought about the weather and owing money. I know that it is also possible to use two colours of counters: one for negative integers and the other for positive ones.
Activity 2: Find Integers on a Number Line
Ask students to draw a number line from - 10 to 10, and locate the following integers on the line: 2, - 6, - 8 and 7.
Source: translated from Réduction des écarts de rendement, 9e année, p. 11.
Activity 3: Represent Whole Numbers with Counters
Which integers are shown below? (The white counters represent positive integers and the red counters represent negative integers)
a)
b)
Solution
a) 3
b) - 8
Use counters to represent the opposite number of each of the integers obtained in a) and b) and indicate what that number is.
Solution
Source: translated from Réduction des écarts de rendement, 9e année, p. 11.