咖啡机使用后会在壶底留下一些咖啡残渣。

The coffee maker leaves a small ___residue at the bottom of the pot after brewing.

立遗嘱人将大部分财产留给了慈善机构，剩余部分由家人均分。

The testator left most of the estate to charity, with the ___residuum equally divided among family members.

计算除法时，余数可以帮助我们确认结果是否正确。

When doing division, the ___remainder can help verify if the result is correct.