Warm up
Focus on equality and operation sign:
Does 5 + 7 = 11?
Why not?
5 = _ + _
10 = _ + _
2 = _ - _
Substitute a symbol
6 = x + x
10 = y + y
Game
Bulls and Cows - mathematical game. There is a secret code n digit code with all the digits being different. The kids then guess the code. If they have a digit that is present in the code, it is a cow. It they have a digit that is both present and in the correct position, they have a bull. The number of bulls and cows are reported after each guess. The game stops when the code is guessed correctly.
The kids picked a code for Sanjay and Darrin to solve that was 3 digits long. The kids then stumped the adults with a 4 digit code.
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