5665 +6<9+9 19->9+1
7630+40 11角110分 50角◯9元
114+7 15-79+2 80-2090-20
12-64+6 5056-6 76-667-7
78-=70 +10=90
66-=6 -9=9
14 - 7 =
15 - 9 =
16 - 8 =
31 - 5 =
20 + 40 =
85 - 5 =
44 + 7 =
93-90=
15-7+3=
8+(90-50)=
47+30+20=
18+5=
64-7=
68-60=
11-8=
3+40
35-20=
80-60=
35+7=
52+8=
39+20=
70-5=
62-8=
50+15=
65-20=
48-9=