11/12, 1/36, 113/45, 5/6, 11/9, 5/24, 7/12, 1/12
Пошаговое объяснение:№1. 1) 3/12 = 3 : 3/12 : 3 = 1/4;
2) 25/30 = 25 : 5/30 : 5 = 5/6;
3) 1/4 + 5/6 = (3 * 1)/12 + (2 * 5)/12 = 3/12 + 10/12 = 13/12 = 1 1/12.
ответ: 1 1/12.
№2. 1) 10/24 = 10 : 2/24 : 2 = 5/12;
2) 21/54 = 21 :3/54 : 3 = 7/18;
3) 5/12 - 7/18 = (3 * 5)/36 - (2 * 7)/36 = 15/36 - 14/36 = 1/36.
ответ: 1/36.
№3. 1) 30/54 = 30 : 6/54 : 6 = 5/9;
2) 22/30 = 22 : 2/30 : 2 = 11/15;
3) 5/9 + 11/15 = (5 * 5)/45 + (3 * 11)/45 = 25/45 + 33/45 = 58/45 = 1 13/45.
ответ: 1 13/45.
№4. 1) 28/40 = 28 : 4/40 : 4 = 7/10;
2) 10/75 = 10 : 5/75 : 5 = 2/15;
3) 7/10 + 2/15 = (3 * 7)/30 + (2 * 2)/30 = 21/30 + 4/30 = 25/30 = 25 : 5/30 : 5 = 5/6.
ответ: 5/6.
№5. 1) 12/27 = 12 : 3/27 : 3 = 4/9;
2) 14/21 = 14 : 7/21 : 7 = 2/3;
3) 4/9 + 2/3 = 4/9 + (3 * 2)/9 = 4/9 + 6/9 = 10/9 = 1 1/9.
ответ: 1 1/9.
№6. 1) 14/24 = 14 : 2/24 :2 = 7/12;
2) 15/40 = 15 : 5/40 : 5 = 3/8;
3) 7/12 - 3/8 = (2 * 7)/24 - (3 * 3)24 = 14/24 - 9/24 = 5/24.
ответ: 5/24.
№7. 1) 12/18 = 12 :6/18 : 6 = 2/3;
2) 5/60 = 5 : 5/60 : 5 = 1/12;
3) 2/3 - 1/12 = (4 * 2)/12 - 1/12 = 8/12 - 1/12 = 7/12.
ответ: 7/12.
№8. 1) 4/24 = 4 : 4/24 : 4 = 1/6;
2) 3/36 = 3 : 3/36 : 3 = 1/12;
3) 1/6 - 1/12 = (2 * 1)/12 - 1/12 = 2/12 - 1/12 = 1/12.
ответ: 1/12.
1 - 20,02
2 - 5,199
3- (-104,71)
4 - (-4,87)
5 - 407,841
6 - 175,84625
7 - 26,846
8 - 42,24
Пошаговое объяснение:
1. 22 - 2,98 - 0,2 : 0,4 - 2,1 + 3,6.
1) 0,2:0,4 = 0,5
2) 22-2,98-0,5-2,1+3,6 = 20,02
2. 21,585 - 0,585 - 18,009 : 3 : 0,9 +0,869 - 10 = 5,199
1) 18,009:3 = 6,003
2)6,003:0,9 = 6,67
3)21,585-0,585-6,67+0,869-10 = 5,199
3. 0,79 - 71 - 31,45 : 0,85 +3,8 - 10, 14:7,8 = -104,71
1) 31,45:0,85 = 37
2)10,14:7,8 = 1,3
3)0,79-71-37+3,8-1,3=-104,71
4.3,13 - (36,599 + 4,026 - 8,545 - 0,08) : 4 = -4,87
1)36,599 + 4,026 - 8,545 - 0,08 = 32
2)32:4 = 8
3) 3,13-8 = -4,87
5. 23 - 0,05 - 10,1 + 0,395 : (49,001 - 49) - 0,009 = 407,841
1)49,001 - 49 = 0,001
2)0,395:0,001 = 395
3) 23-0,05-10,1+395-0,009 = 407,841
6. 176 - (1,866 + 3,134 - 3,77): (15,481 + 1,2 - 8,681) = 175,84625
1)1,866 + 3,134 - 3,77 = 1,23
2) 15,481 + 1,2 - 8,681 = 8
3)1,23:8 = 0,15375
4) 176-0,15375 = 175,84625
7. 21 - 0,2 - (92,28 - 91) + 73,26 : (10,45 - 0,45)=26,846
1) 10,45 - 0,45 = 10
2)73,26:10 = 7,326
3) 92,28 - 91 = 1,28
4) 21-0,2-1,28+7,326 = 26,846
8. 35,628 + 2,372 - 316,66 : 0,5 : (99,479 - 284,79 - 0,1) = 42,24
1) 99,479 - 284,79 - 0,1 = -149,411
2)316,66:0,5 = 633,32
3)633,32:(-149,411) = -4,24
4) 35,628+2,372+4,24 = 42,24
