Fraction Addition

Class 4
did you understand the visual relatrd to fraction?
Acknowledgement: Inspired by John Ulbright's applet "Adding Fractions - Visual" ([url=https://ggbm.at/szwBQ7wa]https://ggbm.at/szwBQ7wa[/url])
who helped you to understsnd this?
how can you solve?
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Information: Fraction Addition