# Fraction cylinders

## Mathematics tool

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### Purpose

• Understanding the structure and coherence of fractions and being able to calculate and use them in practical situations

Make fractions comprehensible. You can present simplifications, additions or subtractions because you can place multiple fractions next to each other.

Press the cursor button in the toolbar to control the tool. 2 fraction cylinders are displayed below each other. Click on the '+ fractions' button in the menu bar to add a fraction cylinder, click on the '- fractions' button to remove a fraction cylinder. You can work with a maximum of 4 and a minimum of 1 fraction cylinder at once. Click on the '+' and '-' to adjust the numerator or the denominator or select one of the fraction components to change their value. The number and the visual fraction change simultaneously. If you select the '+' next to the numerator while all components of the fraction are already coloured, a new cylinder will appear to the right of the fraction. Click on the '-' next to the numerator and the new bar disappears.

To hide the numerator and the denominator, select the eye icon to the left of the fraction. The numerator and the denominator become question marks. Click on the eye icon again to uncover the numerator and the denominator in the fraction.