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Elementary and Middle School Mathematics

Elementary and Middle School Mathematics 9th ed

Elementary and Middle School MathematicsTeaching Developmentally provides ideas to help teachers develop a deep understanding of the mathematics they teach, highlighting the benefits of problem-based mathematics instruction.

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The liar’s paradox

This statement is false.

Think about it!

If true, then ‘This statement is false’ is true. Therefore the statement must be false. That is, if it is true then it is false!

If false, then ‘This statement is false’ is false. Therefore the statement must be true That is, if it is false then it is true!