Grade 9 Mathematics
Whole numbers Properties of numbers and calculations using whole numbers
9m 16s
In this lesson, you will learn how numbers are very important as we always use them in our lives and without numbers, there is no math. By the end of this lesson, you will be able to define and distinguish the properties of natural numbers, whole numbers, integers, and rational and irrational.
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Whole numbers  calculations using wh...
In this lesson, you will learn you how to use addition, multiplication, subtraction and division.

Whole numbers  factors & multiples o...
In this lesson, you will learn how numbers can be divided and have no remainders, you will be able to define a factor and a multiple of a number and determine the highest common factors and the lowest common multiple and solve for ratios and rates.

Whole Numbers  Ratios, rates and pro...
In this lesson, you will learn about ratios and compare two qualities with the same units, to ensure all the units are the same we must divide each part of the ratio with the highest common factor. At the end of this lesson, you will know how to solve problems for ratios, rates and proportions.