Пошаговое объяснение:
а) 3 2/5 + 5 4/15= 17/5 + 79/15= 51/15+79/15= 130/15 = 8 2/3
б) 7 4/9 - 8 5/6= 67/9 - 53/6= 134/18- 159/18= -25/18= - 1 7/18
в) 3 1/5 * (-1 1/4) 16/5 *(-5/4)=-4
г) -1 7/9 : (- 2/3)=- 16/9 :(-2/3)= -16/9 * (-3/2)= 8/3= 2 2/3
А)
3. 2/5 + 5. 4/15 = 3. 6/15 + 5. 4/15 = 8. 10/15 = 8. 2/3
Б)
7. 4/9 - 8. 5/6 = 7. 8/18 - 8. 15/18 = -1. 7/18
В)
3. 1/5 * (-1. 1/4) = 16/5 * (-5/4) = 4/1 * (-1/1) = -4/1 = -4
Г) -1. 7/9 : (-2/3) = -16/9 * (-3/2) = -8/3 * (-1/1) = 8/3 = 2. 2/3
Пошаговое объяснение:
а) 3 2/5 + 5 4/15= 17/5 + 79/15= 51/15+79/15= 130/15 = 8 2/3
б) 7 4/9 - 8 5/6= 67/9 - 53/6= 134/18- 159/18= -25/18= - 1 7/18
в) 3 1/5 * (-1 1/4) 16/5 *(-5/4)=-4
г) -1 7/9 : (- 2/3)=- 16/9 :(-2/3)= -16/9 * (-3/2)= 8/3= 2 2/3
Пошаговое объяснение:
А)
3. 2/5 + 5. 4/15 = 3. 6/15 + 5. 4/15 = 8. 10/15 = 8. 2/3
Б)
7. 4/9 - 8. 5/6 = 7. 8/18 - 8. 15/18 = -1. 7/18
В)
3. 1/5 * (-1. 1/4) = 16/5 * (-5/4) = 4/1 * (-1/1) = -4/1 = -4
Г) -1. 7/9 : (-2/3) = -16/9 * (-3/2) = -8/3 * (-1/1) = 8/3 = 2. 2/3