Day 20 Numeracy Fractions

Equivalent Fractions

The instructor will review the topic of equivalent fractions. The students will be shown a square, circle and a triangle, all divised up into quarters with one quarter shaded. Students will realize that all these fractions are equivalent, regardless of their shape.

Game

The class will be divided up into three teams. Each team will be given 4 playing cards (ace, 2, 3, and 4 of the same suit). The instructor will write four fractions on the board in four columns (1, 2, 3, & 4), and the students will have to raise the card of the fraction which is NOT an equivalent fraction. In round two, the instructor will write 4 fractions on the board, two of which will be equivalent, and the students will have to raise the cards representing the two fractions that ARE equivalent.

The students will then be given a worksheet where they are two circle the equivalent fractions in each question.

Simplest Form

Students will be shown how to write a fraction in its simplest form by breaking down the numerator and the denominator into its greatest common factors (GFC).

Example: 6/21

1. Find the GFC of 6 & 21
Factors of 6: 1, 2, 3, 6
Factors of 21: 1, 3, 7, 21
So, the GCF (6, 21) = 3

2. Divide the numerator and the denominator by the GCF
6/3 = 2
21/3 = 7

Therefore the simplest form of 6/21 is 2/7