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My casio fx-CG 20 is very dim even when there is plenty of battery and the brightness is full too. Pls help i have a test tmr : r/calculators
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fx-CG Manager PLUS - Supporting Options In The Classroom - Products - CASIO WEW Worldwide Education Website
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Amazon.com: CASIO PRIZM FX-CG50 Color Graphing Calculator,Black & White,7.21"Wx10.32"Lx2.05"H : Everything Else
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