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b) = -48
c) = 85
d) = -25
e) = 6
f) = -13
a) = -138
b) = -20
c) = -126
a) 15*(-4)= - 60
b) -16*3= - 48
c)-17*(-5)= 85
d) -125:5= - 25
e)-72:(-12)= 6
f) 78:(-6)= -13
z.2
a) (-76)-24-38= - 76 - 24 - 38 = - 138
b)42-(-59)-121= 42 + 59 - 121 = 101 - 121 = -20
c)-24-(61)-89-(-48)= -24 - 61 - 89 + 48 = - 126