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b= -2,5*2= -5
c= (-4)*(-0,75)= -4*(-0,75)= -(-4*0,75)= -(-3)=3
d= - 3/5*1/3= - 1/5= -0,2
e= (-1)*(-0,9)= -(-0,9)=0,9
f= (-0,1)*100= -0,1*100= -10
b) 2,5 x ( -2) = - 5
c) (-4) x (-3/4)= 4 * 3/4 = 4/1 * 3/4 = 3
d) 3/5 x (- 1/3) = - 1/5
e) (-1)3 x (-0,9)= (-1)*(-1)*(-1)* (-0.9)=(-1) * (-0.9)= 1 * 0.9 = 0.9
f) (-0,1) x (-10)2 = (-0.1) * ((-10)*(-10)) = (-0.1) * (10 * 10) = - 0.1 * 100 =- 10