KS2 Primary Maths Age 13-17 - Calculations: Subtracting Whole Numbers - Explained

The video tutorial explains how to calculate the total cost of making 20 jars of jam for a school fair. It breaks down the costs of strawberries, sugar, and jars, and demonstrates the calculations needed to find the total cost. The tutorial emphasizes the importance of showing all calculations clearly and provides advice for exam success.

What is the cost per kilogram of strawberries used by Miss Mills?

• £6.90

• £0.79

• £13.80

• £7.50

How many kilograms of strawberries does Miss Mills use?

• 10 kg

• 20 kg

• 15 kg

• 12 kg

What is the total cost of sugar needed for the jam?

• £7.90

• £6.90

• £13.80

• £9.00

How much does it cost to buy 20 glass jars?

• £6.90

• £13.80

• £7.50

• £0.79

What is the total cost to make 20 jars of jam?

• £111.70

• £13.80

• £90.00

• £79.00

How many marks are awarded for correctly calculating the cost of strawberries and sugar?

• Three marks

• Four marks

• Two marks

• One mark

What is the key advice given for solving such problems?

• Skip difficult questions

• Use a calculator

• Show all calculations clearly

• Guess the answers