× =
6﹣4.92=
25×0.7×4=
+0.5=
3- =
6.3÷0.21=
1﹣1÷ =
(0.6- )×16=
= 0.3÷0.7= 32÷1%=
1-1%= 0.33= 756- 198=
1÷= ×= += -=
①3.86+6.4+2.14+7.6
②5.2÷0.32﹣0.12
③()×15
④
⑤
⑥
<,读作:。