4--3= 7 it is the same as 4+3=7. minus a negative is like plus a positive
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Positive 3 plus negative 5 minus negative 2 minus positive 4 is equal to -4.
-1
(-3)-(4)=(-3)+4=1 Minus times minus equals plus. The reason for this we need not discuss.
-3 - (-1)= -3 + 1= -2-2
(-4) - (-7) = (-4) + 7 = 3