6+28=
60+28=
55-5=
55-50=
34+8= 73-5= 68-30= 52+4=
26+40= 93-40= 50+16= 8+45=
13-4+7= 20-(4+5)=
53+3053+40 47-1857-28 8×79×6
12-3= 15-6= 18-6= 13-9=
70-50= 2+45= 88-18= 20+63=
+40=67 78-=26 5+=78
-11=58 +42=48 37-=16
+20<67 87->23 28+>75
15-9= 12-8= 16-7= 4+9=
36-6= 70+10= 35+3= 5+(2+8)=
45+30= 37-9= 75-4= 18-(2+6)=
+10=26 +6=21 +50=57
68-=60 76-=56 -4=30
14-8= 46+30= 13-6= 6+35=
50+23= 6+52= 52-40= 26-3=
47+4= 44+2= 5+28= 17-9=
12-7= 31+9= 50-5= 25-8=
64-40= ( )-7=9 ( )+5=12 15-( )=7
18+720 37+5080-9 1角10分 99-495
15角2元 5元2角50角 66-3076-6
40+548-5 228=30 3元4角4元3分
97-70= 5+58= 67+4= 47+50= 63-6=
7+46= 81-2= 96-6= 85+8= 40-3=
48+7= 76-60= 60-6= 5+37= 62-9=