Dangers of Mathematical Rules
Do you remember when you first learned how to round numbers? For example, to round 687 to the nearest hundred, we notice it’s between 600 and 700. Since 687 is closer to 700 than it is to 600, we round up to 700. Maybe you even learned a rule: Look at the digit to the right of the one you’re rounding. If it’s 5 or greater, round up. If it’s 4 or less, round down. Rules can be good, but they can also be dangerous. ...