ISBN: 9787559397690 - full vertical mental arithmetic cards (full color version of direct addition and subtraction within 100)/special training for young children(chinese edition) (1 Ergebnisse)

paperback. Zustand: New. Language:Chinese.Paperback. Pub Date: 2023-11 Publisher: Heilongjiang Fine Arts Publishing House: Calculation is the most widely used mathematical knowledge in people's daily lives. and vertical calculation is an important part of calculation. Vertical calculation makes calculation no longer limited to an abstract result. but highlights the reasoning process. so that students' calculation process is presented more vividly and intuitively. In order to improve students' vertical calculation abi.…