Age 7 to 11
Why do this problem?
This activity challenges pupils to use all four operations and their knowledge of number facts. It is a great opportunity to develop problem-solving skills as the calculations on their own are not enough.
The introduction needs to emphasise the rules of the situation, clearly stating what is allowed. Introduce the activity by working together through the example shown at the start of challenge 1.
If other examples are needed before learners set off on their own, then totals of 30, 31, 33, 34, 35, 42, 43, 46, 48, 49, 50, 51, 52, 53, 58, 59, 60 and 61 could be used as well.
Tell me about how you are doing this.
Can you tell me why this is correct?
How are you making sure you obey the rules?
The pupils could set up their own challenges for different slab lengths.
Some children may need some connecting cubes to represent the long slabs.