六点8+1点二五×6点8+6点八简便计算

六点8+1点二五×6点8+6点八简便计算
2025-04-07 10:15:25
推荐回答(1个)
回答1:

6.8+1.25×6.8+6.8
=(1+1.25+1)×6.8
=(3+1/4)×6.8
=3×(7-0.2)+1/4×6.8
=21-0.6+1.7
=22.1。