999.9222.2+333.3333.4简便计算

分类: 作业答案 • 2021-12-23 20:08:33

问题描述：

999.9*222.2+333.3*333.4简便计算

答

999.9×222.2+333.3×333.4
=3×333.3×222.2+333.3×333.4
=333.3×（3×222.2）+333.3×333.4
=333.3×666.6+333.3×333.4
=333.3×（666.6+333.4）
=333.3×1000
=333300

999.9*222.2+333.3*333.4简便计算