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1、第1列第1行第1列第1行第2行第4列第1列第1行(4,2)第2行第4列1100(1,1)(2,1)(3,0)110(1,1)11(8,6)1234512345667891070(1,1)(8,6)1234512345667891070(1,1)(8,6)1234512345667891070(8,6)1234512345667891070(8,6)1234512345667891070(6,6)(2,6)(8,6)1234512345667891070(6,6)(2,6)(8,6)12345123456678910
2、70(6,6)(2,6)(2,3)(2,1)(8,6)1234512345667891070(6,6)(2,6)(2,3)(2,1)(8,6)1234512345667891070(6,6)(2,6)(2,3)(2,1)1234512345667891070找出点A(3,1)1234512345667891070找出点A(3,1)(1,3)(3,1)A123451234566789107(8,5)找出点B(8,5)点C(8,1)B0(3,1)A(8,1)C123451234566789107(8,5)B0找出点B(
3、8,5)点C(8,1)(3,1)A(8,1)CABC(3,4)(7,4)(6,7)想想生活中用数对确定位置的例子,并说一说。黑方红方白王(g,2)东经116°北纬31°六安1234512345678910(8,5)B0(3,1)A(8,1)C6012345123456678910在方格图中画出一个长方形,并用数对表示四个顶点的位置,想一想,你发现了什么?