I have three problems that I'm stumped on Please help Math is not my favorite subject Help!!! anyone out there...

1. 401 + 18 x z for z = 10________

2. 55 - K ./. 6 for k = 30 _________

3. 32 + 55 x b ./. 11 for b = 2___________

this symbol is divided by ./. I don't know what to type for division.

Thanks

Keith (fifth grade)