①12.7×99+12.7
②
①x:3=:
②=
③:=:x
④:x=3:12
⑤:x=5%:0.6
⑥=
①101×9.9
②44﹣72÷
③36×()
④÷[(﹣)×3]
⑤95×3.8+6.2÷
⑥0.25×40÷0.25×40