In primary 2, students learn about fractions. Here's what they learn in detail:
- what's fractions, how to write one, and what it means
- comparing and ordering fractions
- adding and subtracting fractions with the same denominator
What's Fractions
Fractions a part of a whole. There are 2 parts to a (proper) fraction -- numerator and denominator.
The denominator tells us how many equal parts a whole is cut into; the numerator is the number of parts we are referring to.
For instance, in the diagram below, ⅓ of the circle is coloured blue. The denominator (number at the bottom) is 3 as the entire circle is cut into 3 equal parts. The numerator (the number at the top) is 1 as we are referring to only 1 part.
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| Fraction of 1/3 |
Comparing and ordering fractions
In comparing and ordering fractions, students compare and/ or fractions containing the same denominator or numerator.
For fractions with the same denominators: the larger the numerator, the larger the fraction.
For fractions with the same numerator: the smaller the denominator, the larger the fraction.
Adding and subtracting fractions with the same denominator
Since the fraction have the same denominator, to add a fraction, we add the numerators (while keeping the denominator the same). To subtract the fractions, we do a subtraction for the numerators (while keeping the denominator the same).
