Adding all the rowsLesson 177 of the lessons course of Mova's primary school: 4 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).0When rows grow by the same number, pair the first row with the last, the second with the one before the last, and so on: every pair has the same sum.1The total is (first + last) × number of rows / 2, and the last row is first + (rows - 1) × step.26 rows: 5, 7, 9, 11, 13, 15 seats.3First + last = 20, 20 × 6 / 2 = 60 seats.← previousWhich row? Steps that grow by the same numbernext →Days of the week after many days↑ back to LessonsThis page in Markdown → https://md.mova.elamur.ai/free/en/corpora/school/lessons/177-sum-of-rows/