How do basic facts and patterns me multiply a number by a multiple of 10

Multiplying a number by 10 makes calculations much easier

Step-by-step explanation:

To multiply a number by , add n zeroes to a number.

For example, 25×1000=25×10³=25000

Consider the following pattern:

So, basic rules of multiplying a number by 10 makes calculations much easier.

Foe example consider the following example:

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.