Use place value cards to practice rounding numbers to the nearest ten and hundred. Warm up with a Mystery Math Mistake to hunt for the mistake made counting up on the number line. Use place value ...

Editor's Note: I just thought I should mention that there's an ongoing, ever-evolving, and dramatically different presentation of this topic entitled Rounding 101 on my personal website. We'll start ...

I remember when I was a kid at school and the teacher first taught us how to round numbers. The technique he taught us is known as arithmetic rounding, also called round-half-up. In this case, values ...

The mysteries of rounding are exposed; strict, unbiased rounding can be applied. Chris BurgessRounding a result to the required number of decimal places is easy, isn’t it? After all, we were all ...