Decimals and fractions
Solve simple measure and money problems involving fractions and decimals to two decimal places
What a learner can do afterwards
- Calculate 1/4 of £3.20
- A rope is 2.5 m long; how much is left after cutting 0.75 m?
- Find 3/10 of 1 kg and express the answer in grams and as a decimal of a kg
1 · Read
You already know how to find a fraction of an amount, and you know decimals like 0.1 and 0.01. Now put both together to solve real problems with money and measuring.
A ribbon costs £3.20. Priya wants 1/4 of it. She divides £3.20 by 4: £3.20 ÷ 4 = £0.80. So 1/4 of £3.20 is £0.80.
A rope is 2.5 m long. Ben cuts off 0.75 m. Line up the decimal points and subtract: 2.50 − 0.75 = 1.75 m left.
To find a fraction of an amount, divide by the bottom number. To subtract decimals, line up the decimal points first.
Divide for fractions, line up the points for decimals, and you can solve any money or measuring problem.
2 · Watch
Take it off screen
Where it sits
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
18 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.