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= 12+45
= 57
-75-(-38)
= -75+38
= -37
15+(-45)
= 15-45
= -30
-37+(25)
= -37+25
= -12
.B. -75-(38)= -75 + -38= -113
C. 15+(-45)= 15-45=-30
D. -37+(25) = 25 - 37 = -12