www.5129.net > 先估一估,再列竖式计算.36X7

先估一估,再列竖式计算.36X7

36x7≈40×7=280 48x6≈50×6=300竖式如下:

约40x7=280 36x7=252

先估一估,再列竖式计算。36X7 36×7=252 有用请采纳。

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