Ratio
1) notation, representations and interpretation of a:b and a:b:c, where a, b and c are whole numbers, excluding ratios involving fractions and decimals
2) equivalent ratios
3) dividing a quantity in a given ratio
4) expressing a ratio in its simplest form
5) finding the ratio of two or three given quantities
6) finding the missing term in a pair of equivalent ratios
7) finding one quantity given the other quantity and their ratio
8) solving up to 2-step word problems involving ratio
Students would be able to:
(a) use objects in the classroom to practise simplifying ratios and using ratio language, e.g. “The ratio of the number of boys to the number of girls is 15 to 20”, and 15:20 = 3:4.
(b) work in groups to make different ratios from two or three given sets of objects, e.g. given 8 blue cubes and 12 green cubes, make different ratios by forming equal groups of varying sizes and recognise the ratios as equivalent ratios because the number of cubes remain unchanged, only groupings change.
(c) make connections between simplifying fractions and ratios by dividing the terms of the fraction/ ratio by a common factor.
(d) solve problems using the part-whole and comparison models.
You can find out more about Golden Ratio HERE.
Stop at 5min 10 s for Ratio only
Ratio Representations of 2 or More Quantities
Equivalent Fractions
Equivalent Ratios
Ratio in Simplest Form
Problem Solving with Ratio
Ratio involving 3 Quantities