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.
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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.
Draw one mark for each of the first four cars:
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For the fifth car, draw a crossing mark over the four marks:
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This group means cars.
Make another group of five for cars 6 through 10:
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Draw two more marks for cars 11 and 12:
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Count the groups:
First group:
Second group:
Two extra marks:
So, the tally marks show that there are 12 red cars.
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