Simply take away another 1. -4 - 1 = -5.
9
4
It is: -4+5 = 1
9
A negative times a negative is a positive (-4)(-5) = positive 20
-9 + 4 = -5 (negative 5)
5
The two negatives cancel out so a negative over a negative is positive. So, -4/-5 = 4/5 or 0.8
Negative 2 # 4 - (-6) = 4 + 6 # 4 + 6 = 10 # 10 ÷ (-5) = -2
5 x -4
-4 +5 -5 + 4
-5*4=-20