Question

I need help with numbers 16-19
thank you :)

Answer 1

I think I can help with a few...
16. They are equal because of distributive property.
18. 12*5 and 3/8 -> 12/1*43/8 -> 516/8 -> 129/2 -> 64.5
19. Everything is right until the last step, where it should be 6 and 2/3.