Series of equations.

1 = 1 : 2/2

1+2

1 + 2 + 3 = 346

1 + 2 + 3 + ? = ?

1 + 2 + 3 + 7 + ?=?

Which expression is equivalent to 2.2-2.5?

Ok yo Radius of 23 feet. What is the circumference?

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