Money Addition & Subtraction
Solve simple money problems involving addition and subtraction, including giving change
What a learner can do afterwards
- Calculate the total cost of two items priced in pence
- Work out change from 50p after buying an item costing 35p
- Solve 'How much more money do I need?' problems
1 · Read
You already know how to add pence and take pence away. Now you will use those same skills on money problems: working out the total cost of things, giving change, and finding out how much more you need.
Mia buys a sticker for 20p and a pencil for 15p. To find the total cost, she adds the two prices: 20 + 15 = 35p.
After you work out change, check it. Add the change back to the price you paid. If the total matches what you handed over, your answer is right.
Sam has 40p. He wants a toy car that costs 60p. He subtracts to find out how much more he needs: 60 - 40 = 20p more.
Add prices to find totals, subtract to find change, and subtract again to see how much more money you need.
More to read
Money and time: FAQ
Money and time both use numbers every day. Coins add up to a price. Clocks add up minutes to an hour.
Practice with real things. Count coins to pay for fruit. Read the clock when you start and finish play.
3: Subtraction
Take away means subtract. Start with the whole group, then remove some. What is left is the answer.
Draw dots and cross out to see it. Count what is left. That check stops silly mistakes.
Properties of addition
Adding has helpful rules. Order does not change the total. So 3 plus 9 is the same as 9 plus 3.
Grouping helps too. You can add 2 plus 3 first, then add 4. The total stays the same however you group.
1.1 Introduction to Whole Numbers
Whole numbers count things. Zero, one, two and on. Each step adds one more.
Order them on a line. Smaller numbers sit left, larger sit right. You can compare by seeing which sits further right.
2 · Watch
به انگلیسیTake it off screen
Where it sits
Where this leads
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.