①0.75× ÷4
② +6÷
③ - ÷
④2- ÷ ×
⑤ × - ÷
⑥ ÷( - × )
: = 2小时:40分钟= 3.6:0.54=
1.5cm:3m= :0.6= 14: =
100×15%= :80%= 48: =
①101×9.9
②44﹣72÷
③36×()
④÷[(﹣)×3]
⑤95×3.8+6.2÷
⑥0.25×40÷0.25×40