①53+27+18=
②96-43-27=
③36+42-19=
④78-29+37=
12+50=
45-6=
9×4+6=
17+31=
61-11-30=
95-19=
78-18=
8×6-6=
3×9=
76-(80-4)=
85﹣26﹣32=
100﹣34+17=
39+15+45=
28+54﹣47=
75-(43-26)= 96-19-37= 29+53-58=
①28+56=
②75﹣34=
③70﹣29=
④92﹣45﹣30=
⑤46+55﹣33=
⑥81﹣(26+37)=
①30+28=
②84-56=
③27+48=
④43+17-50=
⑤92-(45-28)=
47+53= 420÷70= 100-28.5= 0.03×8= 234- 199=
50×80= 2.7÷0.9= = 1÷ =