Ответы
Пошаговое объяснение:
В)
1) -14. 4/5 - 4/15 = -14. 12/15 - 4/15 = -14. 16/15 = -15. 1/15
2) 3. 1/4 * (-15. 1/15) = 13/4 * (-226/15) = 13/2 * (-113/15) = -1469/30 = -48. 29/30
3) -48. 29/30 + 47 = -1. 29/30
4) -1. 29/30 : 5. 9/10 = -59/30 : 59/10 = -59/30 * 10/59 = -1/3 * 1/1 = -1/3
Ответ: -1/3
Г)
1) -6. 7/8 + 7. 1/5 = -6. 35/40 + 7. 8/40 = -6. 35/40 +
6. 48/40 = 13/40
2) 13/40 : 3/4 = 13/40 * 4/3 = 13/10 * 1/3 = 13/30
3) 4. 21/40 - 5. 1/4 = 4. 21/40 - 5. 10/40 = 4. 21/40 -
- 4. 50/40 = -29/40
4) -29/40 : 1. 9/20 = -29/40 : 29/20 = -29/40 * 20/29 =
-1/2 * 1/1 = -1/2
5) 13/30 + (-1/2) = 13/30 - 1/2 = 13/30 - 15/30 = -2/30 = -1/15
Ответ: -1/15
в) (3 1/4*(-14 4/5-4/15)+47):5 9/10=(13/4*(-14 12/15-4/15)+47):59/10=
(13/4*(-14 16/15)+47):59/10=((13/4)*(-226/15)+47)*10/59=(-13*226/(4*15)+47)*10/59=((-1469+1410)/30)*10/59=(-59/30)*(10/59)=-1/3
г) 1) 7 1/5-6 7/8= 7 8/40-6 35/40=(48-35)/40=13/40
2) 13/40: 3/4=(13*4)/(40*3)=13/30
3)4 21/40-5 1/4=4 21/40-5 10/40=-(-4 21/40+5 10/40)=-(50-21)/40=-29/40
4)-29/40:29/20=-29*20/(40*29)=-1/2
13/30-1/2=(13-15)/30=-2/30=-1/15