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(-5)x(-8)=40,
12x6=72,
40-72=-32
2. (-50):5=-10,
15x(-8)=-120,
60-10=50,
50-120=-70
3. (-18)x7=-126,
60: (-5)+ =-20,
40-126=-86,
-86-20=-126
4. 30x(-7)= -210,
400:(-5)= -80,
-210-80=-290,
-290-20=-310
5. 90:(-6)=-15,
(-15)x(-14)= 210,
80+210=290,
290-300=-10
2. -70
3.-126
4.-310
5-10