Why is the kitchen a good place to learn maths?
The kitchen gives children numbers, units and calculations in a situation with a visible purpose. They need to count fruit, weigh flour, divide food or work out the cost of one portion.
The Education Endowment Foundation recommends using everyday routines to talk about counting, comparing, sharing and measuring. With older children, the same idea can extend to fractions, ratios and costs: start with a real problem at the table or scales rather than an abstract calculation.
In short:
- ages 6–7: count, compare and read simple measuring jugs and scales;
- ages 8–9: convert g and kg, ml and l, and divide a whole into halves, quarters and equal portions;
- ages 10–12: double and reduce recipes, calculate ratios, discounts and cost per portion;
- write the unit with every calculation;
- an adult handles knives, the oven, the hob and hot liquids.
How can you practise maths in the kitchen with a child aged 6–7?
For ages 6–7, the best tasks use real objects, scales and marked measures. There is no need for complicated calculations at this stage.
1. Counting ingredients. Put out 8 strawberries and ask your child to move 3 into a bowl. There are 5 strawberries left, because 8 − 3 = 5.
2. Comparing amounts. Put 8 apple pieces on one plate and 5 on another. The first plate has 3 more pieces, because 8 − 5 = 3.
3. Reading a measuring jug. Pour 300 ml of water into a marked jug and ask how much more is needed to reach 500 ml. It needs 200 ml more, because 500 ml − 300 ml = 200 ml.
4. Weighing. Put an empty bowl on zeroed scales and add flour until the display reaches 250 g. Your child watches the number rise and stops at 250 g.
To reinforce school examples later, you can use units of measure for Grade 2 / Year 3 and the guide which maths problems to practise in Grade 2 / Year 3.
Which kitchen tasks are good for a child aged 8–9?
At ages 8–9, you can combine measuring with simple conversions and dividing a whole into equal parts.
1. Grams and kilograms. A bag contains 2 kg of potatoes. That is 2000 g, because 1 kg = 1000 g, so 2 × 1000 g = 2000 g.
2. Millilitres and litres. A jug contains 1500 ml of water. That is 1 l 500 ml, because 1000 ml = 1 l and 500 ml remains after subtracting 1000 ml.
3. One half. You have 12 grapes and want to split them into two equal groups. Half is 6 grapes, because 12 ÷ 2 = 6.
4. One quarter. You have 20 cucumber slices. One quarter of the whole amount is 5 slices, because 20 ÷ 4 = 5.
5. Equal portions. 24 mini sandwiches need to be shared among 6 people. Each person gets 4 sandwiches, because 24 ÷ 6 = 4.
These examples work well alongside multiplication and division for Grade 3 / Year 4 and simple fractions for Grade 3 / Year 4.
If a recipe uses a tablespoon or teaspoon, treat it as an approximate measure. For precise practice, grams and millilitres are better.
How can you practise ratios and percentages with a child aged 10–12?
An older child can do calculations that genuinely change a recipe or a shopping decision. First identify what quantity is known and what you need to find.
1. Doubling a recipe. A recipe needs 200 g of flour. If you double it, you need 400 g, because 200 g × 2 = 400 g.
2. Half a recipe. If the recipe uses 400 ml of milk, half is 200 ml, because 400 ml ÷ 2 = 200 ml.
3. Ratio. You need 300 g of rice for 6 portions. For 4 portions, you need 200 g, because 300 g ÷ 6 = 50 g per portion, and 50 g × 4 = 200 g.
4. Percentage discount. An item costs 40 coins and has a 25% discount. The discount is 10 coins, because 25% of 40 coins is 0.25 × 40 coins = 10 coins. The price after the discount is 30 coins, because 40 coins − 10 coins = 30 coins.
5. Cost per portion. The ingredients cost 18 coins and the dish makes 6 portions. One portion costs 3 coins, because 18 coins ÷ 6 = 3 coins.
For further practice, use fractions for Grade 4 / Year 5, practical calculations for upper primary, percentages and proportional reasoning.
How do you scale a pancake recipe to 2× and ½?
The clearest method is to change each ingredient separately and keep the same unit. Suppose a simple recipe for about 8 pancakes uses 200 g flour, 400 ml milk, 2 eggs and 20 ml oil.
Ingredient | Basic recipe | 2× recipe | ½ recipe |
|---|---|---|---|
Flour | 200 g | 400 g | 100 g |
Milk | 400 ml | 800 ml | 200 ml |
Eggs | 2 | 4 | 1 |
Oil | 20 ml | 40 ml | 10 ml |
The check is simple. For the 2× version, multiply every ingredient by 2: 200 g × 2 = 400 g, 400 ml × 2 = 800 ml, 2 × 2 = 4 eggs, 20 ml × 2 = 40 ml. For half, divide each by 2: 100 g, 200 ml, 1 egg and 10 ml.
You can ask: “Which ingredient is easiest to scale mentally, and which one is better written as a calculation?” That makes strategy choice part of the practice too.
How do you keep units consistent in kitchen calculations?
The most important rule is: do not add or compare quantities until their units match. Remember these two basic relationships:
- 1 kg = 1000 g
- 1 l = 1000 ml
Example: 1 kg of flour plus 250 g of flour is 1250 g, because 1 kg becomes 1000 g, then 1000 g + 250 g = 1250 g. You can also say 1 kg 250 g.
Do not write an answer such as “1250” without a unit. In the kitchen, a number without “g”, “ml”, “coins” or “items” often does not tell you what it refers to.
How can you keep kitchen maths safe?
A maths task should never require a child to do something unsafe for their age. An adult handles knives, the oven, the hob, boiling water and hot dishes, or provides direct supervision if an older child is already able to perform a particular task safely.
A child can read numbers from scales, hand over ingredients, count portions, write calculations and measure cool liquids. Before starting, make sure the bowl and measuring jug are stable and wipe up spills.
What mistakes should you avoid?
The most common mistake is doing the calculation for the child before they have had time to think. Give them a moment to try and ask them to explain their method.
Also avoid:
- mixing g with kg or ml with l without converting first;
- leaving the unit off the answer;
- changing several things in the recipe at once;
- treating tablespoons and teaspoons as perfectly exact measures;
- choosing a difficult calculation only because the child is older.
If an answer looks strange, return to the question: “If we doubled it, should there be more or less?” A sense check like this often finds an error faster than recalculating.
Sources
- Education Endowment Foundation, Integrating maths into everyday routines, materials accompanying the report “Improving Mathematics in the Early Years and Key Stage 1”.
- Education Endowment Foundation, Supporting the learning of mathematics at home, 2020.