[2.25+（33/5÷1.8-1.21×5/11）]÷40%
问题描述：
[2.25+（3
÷1.8-1.21×3 5
）]÷40% 5 11
答
[2.25+（3
÷1.8-1.21×3 5
）]÷40%，5 11
=[2.25+（
÷18 5
-0.55）]÷40%，9 5
=[2.25+（
×18 5
-0.55）]÷40%，5 9
=[2.25+（2-0.55）]÷40%，
=[2.25+（2-0.55）]÷40%，
=3.7÷0.4，
=9.25．