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entonces a) 3x(7+5)x2=72 asi si se cumplee 3x12x2 = 72
b)25x5+3=200 debemos sumar 5+3 = 8 x 25 = 200
por lo tanto 25x(5+3)=200
primero se suma luego multiplica
c) (45-11)x2=68 debemos restar y multiplicar
34 x 2 = 68
b)25x(5+3)=200
c)(45-11)x2=68