Working backwards through two stepsLesson 117 of the lessons course of Mova's primary school: 3 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0).0To find how many there were at the start, begin at the end and undo each step in the opposite order.1Undo «spent half» by doubling, undo «spent 4» by adding 4 back, undo «got 4 more» by taking 4 away.2She spent half her money, then 4 dollars more, and had 6 left: before the 4 she had 6 + 4 = 10, before the half 10 × 2 = 20.← previousThe average of a few scoresnext →Two steps and a number you do not need↑ back to LessonsThis page in Markdown → https://md.mova.elamur.ai/free/en/corpora/school/lessons/117-working-backwards/