简便运算:33×37

来源:学生作业学帮网 编辑:学帮网 时间:2024/07/04 06:26:48

简便运算:33×37

33×37
=﹙35-2﹚﹙35+2﹚
=35²-4
=﹙30+5﹚²-4
=30²+2×30×5+5²-4
=900+300+25-4
=1221

33*37=1221

33×37
=11×111
=1221