Пошаговое объяснение:
1) -7,5 : (-0,5) = -7. 5/10 : (-5/10) = -7. 1/2 : (-1/2) = -15/2 * (-2/1) = 15/1 = 15
2) -4/7 : (-8/21) = -4/7 * (-21/8) = -1/1 * (-3/2) = 3/2 = 1. 1/2
3) 7. 6/7 : (-9. 3/7) = 55/7 : (-66/7) = 55/7 * (-7/66) = -55/66 = -5/6
Пошаговое объяснение:
1) -7,5 : (-0,5) = -7. 5/10 : (-5/10) = -7. 1/2 : (-1/2) = -15/2 * (-2/1) = 15/1 = 15
2) -4/7 : (-8/21) = -4/7 * (-21/8) = -1/1 * (-3/2) = 3/2 = 1. 1/2
3) 7. 6/7 : (-9. 3/7) = 55/7 : (-66/7) = 55/7 * (-7/66) = -55/66 = -5/6