Compare lengths
35 cm is greater than 28 cm.
The numbers use the same unit, so compare 35 and 28.
Year 2
Compare and order lengths, mass, volume and capacity and record the results using >, < and =
Compare measurements carefully and order them from smallest to greatest or greatest to smallest.
Lesson overview
Measurement
When two measurements use the same unit, we can compare the numbers directly. The greater number shows the greater measure. We can record comparisons using <, > and = and then place several measurements in order.
Compare mass
500 g is less than 700 g.
Because 500 is smaller than 700, the mass is smaller.
Order capacity
250 ml, 500 ml, 750 ml from smallest to greatest.
Put the measurements in increasing order by comparing the numbers.
Worked example
Order 1 l, 600 ml and 800 ml from smallest to greatest.
- Look at the unit first.
- 600 ml is smaller than 800 ml.
- 1 l is the largest amount here.
- So the order is 600 ml, 800 ml, 1 l.
Try it
Compare the measures carefully, then choose or write the correct order or sign.
Question 1
Which sign makes this true: 42 cm __ 39 cm?
Question 2
Which measure is the heaviest?
Question 3
Which is the smallest capacity?
Question 4
Which order is correct from smallest to greatest?
Question 5
Which statement is true?
Common mistakes
Watch for these when working through the lesson.
- Choosing a comparison sign the wrong way round.
- Ignoring the unit and looking only quickly at the number.
- Not checking whether the question wants smallest to greatest or greatest to smallest.
Related topics
These ideas fit closely with this lesson.
- Choose and use appropriate standard units to estimate and measure length, height, mass, temperature and capacity.
- Recognise and use symbols for pounds and pence; combine amounts to make a particular value; solve simple problems involving money.