$ think about the homework before your child starts doing it

$ what is the purpose of this homework?

$ can this homework be utilized in real-life situations

$ motivate your child to to think about the homework task through the lens of some working environment - put it is some wider perspective (teachers do not have time to do this at school - it is more difficult to motivate the whole class than just one student - informal motivation works better, example: Google Bridge disasters caused by engineering error - to raise awareness of your child in terms of risks associated with every job...

And though it is no laughing matter - the homework can be fun - if for example you connect the boring calculation with "script writing/research for a film"