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Compare lengths, capacities and masses with the same informal units; choose uniform and smaller units for accuracy.
Free examples and worked answers. No account needed.
Practise the method.
Compare lengths, capacities and masses with the same informal units; choose uniform and smaller units for accuracy.
Compare lengths, capacities and masses with the same informal units; choose uniform and smaller units for accuracy.
Example 1
Rows A and B use the same units. What is the difference between their lengths in units?
Equal-unit lengthsShow worked answer
Answer: 0
- Row A is 6 units long and row B is 6 units long.
- Subtract the smaller count from the larger: 6−6=0 units.
Example 2
Which set of units can measure a desk fairly, with no gaps or overlaps?
Show worked answer
Answer: Identical paperclips
- A fair measurement repeats the same-sized unit.
- Place identical units end to end with no gaps or overlaps.
Example 3
A jug holds more than 6 large cups but less than 7. What helps measure the leftover amount more accurately?
Show worked answer
Answer: Use smaller identical cups
- The large unit does not fit the leftover amount exactly.
- A smaller uniform unit measures smaller amounts; keep the cups the same size for a fair measurement.
Put it into practice.
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