101×1.1-7.3-3.7 7.85+4.23-2.05+5.77
3.9÷0.4+3.9÷0.6 6.46×4.5+4.5×4.54-4.5
(13.2-0.24×20)÷0.14 1.6×[(1.8+1.95)÷2.5]