6.8×8/25+0.32×4.2−8÷25.

问题描述:

6.8×

8
25
+0.32×4.2−8÷25.

6.8×

8
25
+0.32×4.2-8÷25,
=6.8×0.32+0.32×4.2-0.32,
=(6.8+4.2-1)×0.32,
=10×0.32,
=3.2.