<span>1320 = 2•2•2•3•5•11
930 = 2•3•5•31
НОД(1320, 930) = 2•3•5 = 30</span>
4) 1,512 : (- 0,27) = - 5,6
5) - 42/55 : (- 98/99) = (-42/55) * (-99/98) = (-6/5) * (-9/14) = 54/70 = 27/35
6) - 1 1/27 : 7 7/9 = - 28/27 : 70/9 = - 28/27 * 9/70 = - 28/210 = - 2/15