Tally marks and frequency tables

Tally marks are used for counting things. They are small vertical lines (like the number 1) each one representing one unit. The 5th tally mark in a group is always drawn across the first four - as this makes it easier to count the total in groups of five.

In the second column of the table below, the manager has used tally marks to keep track of how many bikes he has sold. This table is known as a frequency table and it shows the totals of the tally marks at the bottom.

Bike	Tally	Total
Ranger		3
Outdoor		5
Tourer		0
Starburst		2
Mountain		10
Total bikes sold		20