①(﹣)×÷
②×0.375+÷
③23﹣×÷
④(×)×3×8
(5) ()
1÷25%=
0.22=
-0.2=
×2 ÷ ×2=
1.4-1.08=
0×(-)=
+÷+=
99×0.8+0.8=
①
②
③
④
⑤
⑥