9,7×8,8＋0.85×2＋0,85 简便计算

分类: 作业答案 • 2022-03-18 08:42:46

问题描述：

答

9.7x8.8+0.85x2+0.85
=(10-0.3)X8.8+0.85X3
=10X8.8-8.8X0.3+0.85X3
=88-0.88X3+0.85X3
=88-(0.88-0.85)X3
=88-0.03X3
=88-0.09
=87.91