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=(-680) ÷ (-2)
=340
B) (-4) x (-35) x (-18) ÷ (-9) ÷ (+7)
=(-2520) ÷ (-9)
= (280) ÷ (+7)
=40
tomamos mitad
4 x (-17) x 5 = - 340
b) -4 x x ()
-4 x 5 x 2 = -40
Ses que el ejercicio es como lo ha escrito