《有趣的算式》精品

1×9＋2＝ 11 12×9＋3＝ 111 123×9＋4＝ 1111 1234×9＋5＝ 11111 12345×9＋ 6 ＝ 111111 123456× 9 ＋ 7 ＝ 1111111
1.人们在联欢时，会自然地围成圆形，为什么？ 想一想，说一说。
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北师大版 四年级上册 第三单元 乘法
序言
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1×1＝
1ห้องสมุดไป่ตู้
11×11＝ 121
111×111＝ 12321
1111×1111＝ 123？4321
1234？54321
5个1
5个1
99×99＝ 9801 999×999＝ 998001 9999×9999＝ 99980001 99999×99999＝ 9999800001 999999×999999＝ 999998000001