Find the missing number in each negative number equation.
Questions:
Q1: -2 + ______ = -5
Q2: ______ + (-6) = -10
Q3: -8 + ______ = -3
Q4: ______ - (-7) = 2
Q5: -4 - ______ = -9
Q6: ______ + (-12) = -20
Q7: -15 + ______ = -10
Q8: ______ - (-4) = -1
Q9: -7 + ______ = 0
Q10: ______ + (-9) = -2