18-9= 60-40= 18-6= 50+20=
24+50= 48+7= 75+5= 83-6=
20-6+3= 50+27-8= 27+5+9=
40+50+6= 64-30+6= 85-(10+50)=
33+(46+4)= 96-(68-60)= 42-7-30=
15-8=
20+8=
12-3=
13-6=
11-4+50=
11-7=
14-5=
3+30=
4+7=
17-9+80=
8+9=
74-4=
60+5=
9+40=
7+80-7=
8+8=
8+6=
15-9=
13-8=
15-10=
19-8=
14+3=
3+8=
18-9=
13-9=
16-7=
10+8=
5+8=
80
60
48
52
54
24.7+71.3 -6.3×4