Sam and Holly's problem
Sam and Holly were playing with combinations of numbers that make 10. They started by getting out 10 blocks.
Sam and Holly were playing with combinations of numbers that make 10. They started by getting out 10 blocks.
Then, Sam covered some of the blocks and Holly had to work out how many were missing.
Then, Sam covered some of the blocks and Holly had to work out how many were missing.
Holly decided she to organise what she could see to help her work out what was missing.
Holly decided she to organise what she could see to help her work out what was missing.
She imaged a 10-frame in her head and organised the blocks. This helped her see she needed 3 more to make 10.
She imaged a 10-frame in her head and organised the blocks. This helped her see she needed 3 more to make 10.
Holly and Sam kept taking turns like this until Holly asked Sam if they could make it more challenging for them...
Holly and Sam kept taking turns like this until Holly asked Sam if they could make it more challenging for them...
Sam made this for Holly to think about:
Sam made this for Holly to think about:
Instructions
Instructions
- Can you help Holly work out how many blocks are hidden?
- Can you help her work out how many of the hidden blocks might be underneath each cup?
- What are all the possibilities? Record your thinking.
Discuss
Discuss
Reflection
- What are possibilities did you find?
- Could you work out what exactly Sam put under each cup for Holly?
- Why?
- Why not?
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