①
②
③
④
⑤
⑥
①0.05=
②0.75=
③0.125=
④=
⑤≈
⑥=
- = + = 4÷3= + =
+ = 1- = 0.2²= - =
②2--
①-(+)
②6--
③-(-)
④+-+
⑤+-
⑥-(+)