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A) (-2) (-5) (+10)= (-)(-)(+) = (+) 2*5*10 = 100
B) (-2) (+25) (-12)= (-)(+)(-) = (+) 2*25*12 = 600
C) (+5) (-6) (-7) (+2)= (+)(-)(-)= (+) 5*6*7 = 210
Division
A) (-200) ÷ (+25) ÷ (-2)= (-)(+)(-)= (+) 200/25 = 8 / 2 = 4
B) (-500) ÷ (+250) ÷ (-2)= (-)(+)(-)= (+) 500/252 = 2 / 2 = 1
C) (-1200) ÷ (-200) ÷ (+3)= (-)(-)(+)= (+) 1200/200 = 6 / 3 = 2
Espero te sirva