Press the cursor button in the toolbar to control the tool.The numbers line starts with 10 units. You can adjust the number of units by using the arrows on the left and right side.
You can divide the units into sub-units in the 'Settings' menu.
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Purpose
- Solving mathematical problems

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Extra
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Ratio & proportion
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Ratio table…

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Geometry and Measurement
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Classifying…

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Statistics
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Graph…

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