Rooms
SMC Primary 4 — Drill 1
5 questions · 10 marks · about 10 minutes
SMC Primary 4 — Drill 2: bars and units
5 questions · 10 marks · about 10 minutes
SMC Primary 4 — Drill 3: counting without losing count
6 questions · 12 marks · about 12 minutes
Do one, then send the results back.
Not sure how one works? Read this first.
The bar model
When someone gives someone else something — the trick behind Drill 1, Question 5. Tap “Teach me this” and it explains itself out loud.
How many rectangles?
Counting without losing count — pick two lines, then two more. (#32)
How many ways from A to B?
The add-as-you-go trick, and the bump in the figure that catches people. (#32)
Sharing in a ratio
An takes 3 while Bình takes 4, and they end up with 133 — why the parts trick works, and what changes when the question gives you a gap instead of a total. (#32)
Two towers, the same height
6 cubes reach as high as 5 cylinders — so why does the working say 5 : 6? Reading a ratio off a picture, and the check that catches you when you read it backwards. (#32)