SUCCESS CRITERIA: You will develop better strategies for solving mathematical problems. You will understand the need for a methodical approach to writing down your solutions / suggestions and proofs.
ENGAGEMENT ACTIVITY: Two plus Two
LESSON:
Here is one idea that might help you get started
Possible approaches
How would you solve this problem?
acc
Let b be 1 then 2 then 3 .... can you discard any numbers quickly?
Why? What are you left with? Can you prove anything?
How many solutions to TWO + TWO = FOUR are there? Proof
?
EXTENSION:
What ABout these two sums
Key questions
Are we certain we have considered all the possibilities?Possible extension
Which other word sums work? - eg
ONE + ONE = TWO
FOUR + FIVE = NINE
Which definitely don't work? - eg
ONE + TWO = THREE
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