2 L measured in 1/5 L cups
There are 2 L of juice. Each cup holds L. How many full cups can be filled?
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10 cups
The pattern behind it: Dividing fractions
Share a fraction equally, or count how many small portions fit.
In this one. Count how many cup-sized portions fit. Dividing by a fraction smaller than one can give a larger number.
How to spot it
A total amount split into fraction-sized cups or pieces, asking how many fit, points here. A single fraction shared equally among several parts does too.
Common mistake
Children expect dividing to make the answer smaller, so a bigger result than the starting amount looks wrong to them and they flip the calculation.
Try one like it
Standard 1/2 L shared among 4 bottles Share 1/2 L of juice equally among 4 bottles. How much juice goes in each bottle?The 33 problem patterns
All 33 patterns, one to a page — the 19 behind Primary 5 and 6 word problems, and the skills the younger years are built on. The bar model, how to spot it in the question, and the mistake children make. A booklet you can print. Free.
A PDF, and a note when new solutions go up.