199+49=
10﹣0.01=
5+1.4+1.6=
2.5×40=
× =
24÷ =
+ =
÷2÷ =
①210÷35+12×109
②2.5×1.25×16
③()×12
④ [()]
①367+33=
②9﹣5.2=
③0.6×0.2=
④﹣=
⑤÷=