百ます計算 ひゃくマスけいさん Also written ひゃくますけいさん, 百マス計算 Meanings Noun method of learning through repetition which involves multiplying and other calculations carried out on a 10-by-10 grid of numbers Kanji 百 hundred. Read as ヒャク. 計 measure. Read as ケイ. 算 calculate. Read as サン. Jinuma: Japanese Dictionary · Word lists