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7+(-15)×3= ...
7+(-45) = -38
B)
(-23)+(-9)x 6
(-23)+(-54)
(-77)
C)
(-3)x 4 +5 -(-9)
(-12)+5-(-9)
(-7)-(-9)
(-7)+9
2
D)
8 (-45) : 9+8
-360 : 9+8
-40+8
-32