3.35×6.4×2+6.7×3.69.05×37+64×9.05-9.05五分之四+五分之四-三分之二×九分之五6-五分之三-五分之三-6急最后一道是：六减五分之三减五分之三减6

3.35×6.4×2+6.7×3.6 9.05×37+64×9.05-9.05
=21.44×2+6.7×3.6 =334.85+64×9.05-9.05
=42.88+6.7×3.6 =334.85+579.2-9.05
=42.88+24.12 =914.05-9.05
=67 =905
五分之四+五分之四-三分之二×九分之五
=五分之四+五分之四-二十七分之十
=五分之八-二十七分之十
=二十分之三十二
6-五分之三-五分之三-6
=6-（五分之三+五分之三)-6
=6-五分之六-6
=4.8-6
=负1.2