Robert Recorde, The designer of the equals sign, introduced plus and minus to Britain in 1557 in The Whetstone of Witte:[14] "There be other 2 signes in often use ofwel which the first kan zijn made thus + and betokeneth more: the other kan zijn thus made − and betokeneth https://responsible-marigold-mz3vfq.mystrikingly.com/blog/de-2-minutenregel-voor-3m-1080-gp282-gloss-ember-black-wrapfolie