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2) -2,2 * (- 10/33) = - 22/10 * (-10/33) = 22/33 = 2/3
3) -7 - (2 5/6) = -7 - 2 5/6 = - 9 5/6
4) - 40 : (- 0,8) = -40 : (- 8/10) = -40 : (-4/5) = -40 *(-5/4) = 50
5) -8- (- 3 3/4) = -8 + 3 3/4 = 3 3/4 - 8 = -4 1/4
6) 30 : ( - 0,6) = 30 : (-6/10) = 30 * (- 10/6) = 30 * ( - 5/3) = -50
7) -1,8 * (- 10/27) = -18/10 * (- 10/27) = 18/27 = 2/3
8) -7 + (- 4 4/7) = -7 - 4 4/7 = -11 4/7