=4.2 ÷=27 74:=6:0.3
-=
3.2+6.08=
6.2+0.01=
×0.42=
8-8÷4=
12÷=
2÷-÷2=
×5÷×5=
①1-0.01=
②0.22=
③0.7÷0.1=
④6-=
⑤
⑥120%-1=
⑦÷60%=
⑧÷=