Inhinyerong Sibil 🇵🇭 on Twitter: "EVOLUTION OF CALCULATOR: CE BOARD EXAM EDITION Nov 2018: Casio fx-991ES PLUS May 2019: Casio fx-570ES PLUS Nov 2019: Casio fx-85EX (Ibinalik ang Casio 570ES Plus less
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Inhinyerong Sibil 🇵🇭 on Twitter: "EVOLUTION OF CALCULATOR: CE BOARD EXAM EDITION Nov 2018: Casio fx-991ES PLUS May 2019: Casio fx-570ES PLUS Nov 2019: Casio fx-85EX (Ibinalik ang Casio 570ES Plus less