用竖式计算．
| 760×15= | 296×12= | 17×409= |
和
和
和
．
如图上画了长方体的长、宽、高，这个长方体左面的面积是
| 直接写出得数． 82-27= | 62+25= | 37+23= | 180+20= | 87-26= |
| 56-46= | 600-30= | 130-50= | 540+90= | 80+640= |
| 390-300= | 46+64= | 36÷9= | 7×8= | 63÷9= |
| 3×6+5= | 6+27+9= | 24÷6-3= | 64÷（16-8）= | 9600-600= |
| 8080-80= | 8000-3000= | 35÷5= |  += | 1- = |
 - = |  + = |  + = |  += |  - = |
 -= |  += | 1- = | 2000×5= | 44+8= |
| 37-18= | 1300-500= | 4800÷4= | 11×9= | 32÷8= |
| 100-43= | 5600+400= | 800+200= | 240×4= | 15×6= |
 = |  = |
