45+375 18+1927 16+27+4386
82-532 75-3639 58-(27-14) 17
75+□<90 51<72-□
53-□<18(最小填几?)
34+□>61(最小填几?)
□+49<92(最大填几?)
①46+24=
②72﹣48=
③35+(50﹣18)=
④63﹣(75﹣43)=
①9×3﹣7=
②6×4+40=
③58﹣(14+6)=
④16+(73﹣58)=
96-60=
37+50=
80-8 =
25+9 =
63-6 =
79-30=
48+2=
20+45=
74-8=
75+7=
82-4=
42+33=
36+40+2=
59-9-20=
75-(10+50)=
63-30+5=
56+5-20=
48+(18-9)=