586-(371+129)
398+81÷9
(311-146)×6
360÷3=
150÷5=
880÷8=
480÷6=
404÷4=
844÷2÷2=
424÷4÷2=
720÷8÷3=
47+16=
81-34=
29+66=
90-13=
760-240=
500+420=
660-480=
90+180=
223-45=
538+94=
513-14=
323+677=
76-29+14=
395+72÷8=
9×9-57=
35-35÷5=
620-340=
72+18=
90-72÷9=
(400-320)÷4=
302+303+304+305+306
=( )×( )
=( )
(□+400)÷2=500
□=
3,-2,0,4,-4,-1,8,0