脱式计算
| 921-(344+221) | 960-640÷16 | 200×73÷(543-178) |
| 160+240÷(36-24) | (100÷25+16)÷4 | 520×(80-720÷9) |
| 口算: 125×8=________; | 25×4=________; | 125÷5×0=________; | 360÷90×7=________; |
| 111×111=________; | 125÷5=________; | 0÷137=________; | 45×20=________; |
| 112×988=________; | 56×6=________; | 100×35=________; | 510+0=________. |