3.12+2.46-3.12+2.46 求简便计算

分类: 作业答案 • 2022-02-19 14:06:16

问题描述：

答

3.12+2.46-3.12+2.46
=3.12-3.12+2*2.46
=0+4.92
=4.92
或者
3.12+2.46-3.12+2.46
=3.12-3.12+2*2.46
=0+2*（2.5-0.04）
=5-0.08
=4.92

答

原式=3.12-3.12+2.46+2.46=4.92

答

3.12+2.46-3.12+2.46
=3.12-3.12+2.46+2.46
=0+4.92
=4.92