Deductive Reasoning!

With no homework to check today, we spent most of our time playing around with deductive reasoning problems. One was a problem I call... the marble problem :) Ask them about it.

The other time was spent playing with number tricks... and proving they work using deductive reasoning.

Here, you try one!

Pick a number.
Add five.
Double the result.
Subtract four.
Divide by 2.
Subtract the original number.

What was your answer?

Was it 3? It should have been! There's deductive reasoning for ya--try it with any number--it works!