audio read-through Recognizing Zero and One

Be on the lookout for the following special names for zero and one!

Special Properties of $\,0\,$ and $\,1$

Examples

Decide if the given number is $\,0\,$, $\,1\,$, or a different number:

$\displaystyle\frac13 + (-\frac 13)$ Answer: $\,0\,$
$\displaystyle 0\cdot\frac 13$ Answer: $\,0\,$
$\displaystyle -2\cdot \frac{-1}2$ Answer: $\,1\,$
$\displaystyle\frac{1/7}{1/7}$ Answer: $\,1\,$
$\displaystyle 3\bigl(-\frac13\bigr)$ Answer: not $\,0\,$, and not $\,1$

Practice

This number is:
0
1
not 0, and not 1