Page 79 - Mathematics GRADE 9, DE-STREAMED (MTH1W)

B. Number
Overall Expectations
By the end of this course, students will:
B1. Development of Numbers and Number Sets: demonstrate an understanding of the development and use of numbers, and make connections between sets of numbers
B2. Powers: represent numbers in various ways, evaluate powers, and simplify expressions by using the relationships between powers and their exponents
B3. Number Sense and Operations: apply an understanding of rational numbers, ratios, rates, percentages, and proportions, in various mathematical contexts, and to solve problems
Overall expectation
B1. Development of Numbers and Number Sets
demonstrate an understanding of the development and use of numbers, and make connections between sets of numbers
Specific expectations
By the end of this course, students will:
B1.1 Development and Use of Numbers
research a number concept to tell a story about its development and use in a specific culture, and describe its relevance in a current context
Teacher supports
Examples
• stories that students may share involving number concepts: o number systems:
▪ The Chinese number rod system, dating from as far back as 200 BCE, used red to represent positive numbers and black to indicate negative numbers. This number system was used in commerce to indicate that the amount sold was positive and the amount spent was negative.
o multiplicative thinking and proportional reasoning:
▪ These concepts are used in many cultures and communities in beadwork and
embroidery to produce items with repeating patterns of a certain size. 78