一年级下册数学背诵重点
一年级下册数学重点知识必背汇总1、长方形的对边相等,正方形的四条边都相等。2、长方形、正方形、三角形、平行四边形、圆都是平面图形。3、正方体、长方体、圆柱、球是立体图形。4、至少需要(4)个小正方形才能拼成一个大正方形;至少需要(8)个小正方体才能拼成一个大正方体。5、一个七巧板有(7)块,有(1)个正方形,有(1)个平行四边形,有(5)个三角形,一共有(3)种图形。其中,两个大三角形一样大,是最大的图形;两个小三角形一样大,是最小的图形。6、加数+加数=和,未知加数=和-已知加数被减数-减数=差,被减数=减数+差,减数=被减数-差7、只有求减号“前面数”和求“和”用加法,其余都用减法8、中间...
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