@adamcreen @oldandrewuk Having to teach all the variations and misconceptions that come from "a minus and a minus i… https://t.co/1Dd008XKOu - The Calculator Guide from Twitter

Having to teach all the variations and misconceptions that come from "a minus and a minus is a plus" Still causes issues at A-level

— Tʜᴇ Cᴀʟᴄᴜʟᴀᴛᴏʀ Gᴜɪᴅᴇ (@GuideCalculator) October 24, 2017

from Twitter https://twitter.com/GuideCalculator

October 24, 2017 at 09:50AM
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