Add up all 5 equations given below. What do you notice?
Solve the system and find the values of a, b, c , d and e.
b + c + d + e = 4
a + c + d + e = 5
a + b + d + e = 1
a + b + c + e = 2
a + b + c + d = 0
Age 11 to 14 Challenge Level:
How much does one lollypop cost?
What did Nathan and Judy both buy?
Would it be helpful to write it all out as equations?
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embed rich mathematical tasks into everyday classroom practice.