A fact family is basically just different equations with the same numbers getting the same/different numbers as answers you might say...
this will make more sense:
5x8=40
8x5=40
40/8=5
40/5=8
234 millimeters^2 is your answer
10.20
BECAUSE IF YOU ROUND THE TENTHS 4 MEANS 0.
The second one is correct
I think you have to estimate to a whole so 2 1/2 would be 3
