Calculator tricks using Sharp EL-W531S Writeview. - YouTube
Sharp EL-W531 XH-GR Scientific Calculator WriteView Display Metallic Green with Battery 335 Functions for Grammar/Secondary School, Hobbies & Toys, Stationery & Craft, Stationery & School Supplies on Carousell
Sharp Calculators EL-W535TGBBL 16-Digit Scientific Calculator with WriteView, 4 Line Display, Battery and Solar Hybrid Powered LCD Display, Black & Blue, Black, Blue, 6.4" x 3.1" x 0.6" x 6.4"