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Use the tally marks to do the subtraction
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HOW TO USE
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In this exercise, you need to use tally marks to solve the subtraction problem.
▶ Look at the list of tally marks.
▶ The first number tells you how many tally marks you need.
▶ Click on the tally marks to get the right amount.
▶ Tally marks will appear in the middle of the screen.
▶ Click the tally marks as many times as the second number says.
▶ Count how many tally marks you have.
▶ Use the number pad to enter how many tally marks you counted.
▶ Click the check button to see if you're right.
▶ Press New Question button to try again.
Enjoy practicing subtraction with tally marks!