Back to Sec 1 topics
N2.2 • Sec 1 MOE
Numbers & Algebra
Ratio & Proportion
Simplify ratios and solve basic proportion problems.
0% base complete
Learning objectives
- • Simplify ratios to simplest form
- • Share quantities in a given ratio
- • Solve simple proportion problems
Learning methods:CRAI-We-YouSpaced reviewRetrievalMetacognition
Brain warm-up (try before we teach)
Try first, then learn step by step
Simplify the ratio 15:10. Write as a:b (e.g. 3:2).
3x coin multiplier • Streak protection • Special badges
Foundation — I Do → We Do → You Do
1
Step 1 of 4I Do — Learn
Simplifying ratios
A ratio compares two quantities. Simplify by dividing both parts by their HCF.
12 : 8 → divide by 4 → 3 : 2
2
Step 2 of 4I Do — Learn
Worked example: Sharing $60 in ratio 2:3
Total parts =
1 part = $ = $12
2 parts = $24, 3 parts = $36
Answer: $24 and $36
3
Step 3 of 4We Do — Guided
Guided: Simplify 15:10
Simplify the ratio 15:10. Write as a:b (e.g. 3:2).
4
Step 4 of 4You Do — Practice
Practice: Divide 40 in ratio 3:5
Share 40 in the ratio 3:5. What is the smaller share?