9787530139820 (1 resultados)

paperback. Condición: New. Paperback. Pub Date :2014-06-01 Pages: 92 Language: Chinese Publisher: Beijing Publishing House. I count 1st practice mental arithmetic: 20 or less carry. subtraction abdication around 5-7 years old children during the school readiness must The port operator mental arithmetic to master the ability to write. but for young children will face primary entrance features. centralized in the book exercises. According to different themes. each book nearly 50 single page. each unit with timing trainin.