Estimating and comparing money
Estimate, compare, and calculate different measures including money in pounds and pence
What a learner can do afterwards
- Estimate the length of the classroom in metres
- Compare 1.5 kg and 1200 g and identify which is heavier
- Calculate the total cost of 3 items at £2.45, £1.30, and £0.75
The lesson
Sometimes you do not need an exact number, just a sensible guess. That guess is called an estimate. You can estimate length, mass, or money. Once you have real numbers, you can compare them to see which is bigger, or add them up to find a total.
Amir looks around his classroom without using a ruler. He pictures how many metre-long strides it would take to cross it and guesses about 8 metres. That guess is close to the real length, so it is a good estimate.
To compare money, look at the pounds first. Whoever has more pounds has more money, even if the pence look bigger. Only compare the pence when the pounds are the same.
Estimate first, then compare pounds before pence, and add pounds and pence together to find a total.
Watch it
Where it sits
Learn first
This opens up
Where this leads
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.