0.65乘以6.4减6.5乘以0.54加65乘以9％

分类: 作业答案 • 2022-01-09 18:05:03

问题描述：

答

0.65x6.4-6.5x0.54+65x0.09
=6.5x0.64-6.5x0.54+6.5x0.9
=6.5x(0.64-0.54+0.9)
=6.5x1
=6.5