简便计算：99.91.9+33.34.3

分类: 作业答案 • 2022-06-24 21:39:21

问题描述：

简便计算：99.9*1.9+33.3*4.3

答

99.9×1.9+33.3×4.3
=33.3×3×1.9+33.3×4.3
=33.3×（3×1.9）+33.3×4.3
=33.3×5.7+33.3×4.3
=33.3×（5.7+4.3）
=33.3×10
=333

简便计算：99.9*1.9+33.3*4.3