0.2加中括号六分之五乘小括号0.15加二十分之九括住中括号等于多少?

0.7
2024-11-23 03:53:41
推荐回答(1个)
回答1:

0.2+[5/6×(0.15+9/20)]
=0.2+[5/6×(0.15+0.45)]
=0.2+(5/6×0.6)
=0.2+0.5
=0.7