ребятки очень срочно посчитайте примеры(: a)-3m*(-8k)=? б)5a*(-6b)=? в) -2с*(-0,4b)= г)4*(-2x)*(3y)= д)-0,5*(-3n)*(0.2m)= e)-0.6*5c*(-20)=
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