Show The thing I always say (have done it too, it works!) is if things start getting heated or you feel yourself getting angry - take yourself away for 5mins. Count to 10 or 100 however much you need to,deep breathes and then ask yourself Is it really worth it?`
Does him taking a long time to do something a really really big deal or is it just because you could do it quicker?
Just because he does something a different way or slower doesn't make it wrong (most of the time) 
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Think about your DD, she may be young but they know when theres a atmosphere and it will come through in her. Be it that day, or (if rowing is a regular thing?) later on .... there will eventually come a day when you will see it in her and tbh how can you tell her off for doing something you have inadvertently taught her?
Think about how lucky you are, what you have, etc etc.
It works! Hard to get into the habit of it, but it works! Both of you need to do it!
And the biggest bit of advice I would give anyone - DO NOT let your child see/hear any fall outs between their parents EVER. This comes from me, who did, from the age of 5 and I remember it all . I have lost a massive amount of respect for my mum and all respect from my stepdad because of what happened between them.
If that ^ fails it won't then just look at your DD !