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In the textbook of primary school mathematics published by Beijing Normal University, which grade, which book, which unit and which lesson are the following? (specific location)
Addition-1 and 8-level 1

Addition and oral calculation of 9-grade 1

The factor is a two-digit multiplication and division method. The vertical space and figure of division for the first time: 5. Understanding of centimeters. 8. Touch Ball Game (2)-Grade 2 and Grade 3

6. Angle measurement 7. Probability statistics of triangle area formula-four or five levels.