Numbers, such as 84, have two digits. Each digit is a different
place value.

The left digit is the tens' place.
It tells you that there are 8 tens in the number.

The last or right digit is the ones' place which is 4 in this example.
Therefore, there are 8 sets of 10, plus 4 ones in the number 84.

8 4
| |___{ones' place}
|__________{tens' place}