800除以25的脱式计算如下: ```800 ÷ 25 = (800 × 4) ÷ (25 × 4) = 3200 ÷ 100 = 32``` 或者 ```800 ÷ 25 = (800 ÷ 100) × (100 ÷ 25) = 8 × 4 = 32...