Skill: Use tally marks

Explanation and Free Practice Resources

Tally marks represent quantities by recording one mark for each item and organizing marks into groups of five, with the fifth mark crossing the preceding four; learners read, write, and count these groups to determine a frequency accurately. This understanding supports constructing and interpreting frequency tables and graphs, while excluding more advanced notation, generalized counting systems, or statistical analysis beyond whole-number data frequencies.

Detailed Explanation: Use tally marks

Tally marks help you count items quickly. Make one mark for each item. After four marks, draw the fifth mark across the four to make a group of five.

Example: A student counts 12 red cars.

  1. Draw one mark for each of the first four cars:

    ||||

  2. For the fifth car, draw a crossing mark over the four marks:

    ||||/

    This group means 55 cars.

  3. Make another group of five for cars 6 through 10:

    ||||/ ||||/

  4. Draw two more marks for cars 11 and 12:

    ||||/ ||||/ ||

  5. Count the groups:

    • First group: 55

    • Second group: 55

    • Two extra marks: 22

5+5+2=125+5+2=12

So, the tally marks show that there are 12 red cars.

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Graphing - Create Tally Chart from Data (Pictures)


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