①
②
③
④
① ② ③ ④ ⑤ ⑥
8+2.2=
1.5×6=
10×10%=
56%-28%=
1+0.5%=
1-85%=
1÷1%=
1-98%=
3+150%=
3×75%=
×-25%× (1-×)÷ 85×+15×75%
15.8+4.2÷2.5 1.25×25×3.2
2005× 17×23×