文档介绍:45+15×6=
75-11×5=
56÷14=
2400÷40=
710-420=
250÷5×8=
.42+7-29=
65÷13=
3600÷60=
50×90=
6×5÷2×4=
5600÷80=
7
1800÷36=
384÷4=
2800÷25÷4=
62+18=
123+259+741+477=
35×14=
÷74
45×22=
560÷35÷2=
95×46+46×5=
302×783×0=
÷37=
521-305=
25×4=
102×34=
264×8=
384÷=
3500÷25÷2=
254+99=
749+5036+251=
×9=
73÷9=
25+340=
45×12=
99×99+99=
3875×0=
÷10=
÷
750-570=
614-402=
××
÷
560016=
=
39=
67+28=
50÷7=
4×50=
937×4=
÷=
240÷40=
69÷=
20×2=
285×4=
50÷2=
2
10÷3=
÷13=
1--=
÷
÷5=
×=
78
4=
÷
×2=
17×40=
14=
÷3=
÷14=
100-63=
153÷0=
×=
+=
462
÷
÷=
×=
5=
÷
×3=
14-=
10=
3×=
÷=
÷=
×4=
+=
×500=
×3=
1-=
+=
×4=
÷=
10-=
×8=
÷=
4÷20=
9×=
÷7=
×200=
×2=
÷4=
-=
×5=
×4=
÷15=
×=
×8=
×=
×=
×4=
4×=
×=
×5=
+=
×2=
×2=
×99=
×=
÷=
420÷35=
×=
÷=
25×12=
÷9=
1÷=
135÷=
×3=
×8=
÷17=
÷12=
1-=
+19=
÷4=
++=
÷=
×=
×=
1÷5=
6÷12=
-=
×=
-=
a+=
÷=+=
+=
-=
×=
-=
×=
12a-=
÷16=
6x-=
×4=
×0=
+=
÷3=
×=×=3x+4x=
÷=
-=
7÷=
+=
×=
+=
+=
÷=10x-=+=
+=
×=
-=
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×=
×=
x×x=
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÷=
+5b=
×3=
-=
=
=
-t=
×=
3
8a-3a=
-=
+=