①600 本书 ②平均分给6个年级 ③每个年级5个班
12-3= | 14-7= | 8+4= | 30+7= | 42-2= |
50+6= | 20-9= | 55-50= | 36-6= | 63-3= |
25-5= | 77-70= | 7+9-8= | 64-60+8= | 17-9-2= |
8×3= | 30÷6= | 34-20= | 50+23= |
6+2×3= | 72÷( )=9 | ( )÷5=2 | 7×( )=35 |
13-5= | 60+6= | 15-9= | 39-9= |
6+90= | 16-9= | 18-6= | 15-7= |
33-30= | 20+10= | 6+14= | 8+40= |