Выполните умножение: 1) -12 * 5; 5) -15/16 * (-48/55); 9) 45 * (-8/15); 2) -0,4 * 1,5; 6) -13/24 * 16/39; 10) 16/17 *

1) -12 * 5=-60; 2) -0,4 * 1,5=-0,6; 3) 3,4 * (-1,8)=-6,12; 4) -3/4 * (-5/6)=5/8; 5) -15/16 * (-48/55)=-3/1 * (-3/11)=9/11; 6) -13/24 * 16/39=-1/3 * 2/3=-2/9;7) 6/35 * (-14/15)=2/5 * (-2/5)=-4/25; 8) -7/12 * 24=-7/1 * 7=-14; 9) 45 * (-8/15)=3 * (-8/1)=-24; 10) 16/17 * (-6 3/8)=16/17 * (-51/8)=2/1 * (-3/1)=-6;11) -3 5/9 * (-5 1/4)=-32/9 * (-21/4)=-8/3 * (-7/1)=56/3=18 2/3;12) -1 5/7 * 6 1/8=-12/7 * 49/8=-3/1 * 7/2=-21/2=-10 1/2.