Hi guys, I just needed to know was these answers correct or not

Yes
Yes
No [when you multiply or divide 2 negative numbers, they produce a positive number] -3 x -2 = 6 (-13,6)
No -36 ÷ -9 = 4 (-15,4)
No -3 + 6 = 3 (-15, 3)
No -1 - (-1) = -1 + 1 = 0 (-14, 0)
Yes