Пошаговое объяснение:
1.
1) 3. 4/5 + 3/5 = 3. 7/5 =
4. 2/5
2) 1/4 + 2. 1/3 = 3/12 + 2. 4/12 = 2. 7/12
3) 2. 7/12 + 4. 2/5 = 2. 35/60 + 4. 24/60 = 6. 59/60
2.
1) 1. 1/3 + 2/3 = 1. 3/3 = 2
2) 4. 4/5 + 2 = 6. 4/5
3) 6. 4/5 + 3/4 = 6. 16/20 + 15/20 = 6. 31/20 = 7. 11/20
3.
1) 1 + 3 = 4
2) 4 + 3/4 = 4. 3/4
3) 4. 3/4 + 5. 1/7 = 4. 21/28 + 5. 4/28 = 9. 25/28
Пошаговое объяснение:
1.
1) 3. 4/5 + 3/5 = 3. 7/5 =
4. 2/5
2) 1/4 + 2. 1/3 = 3/12 + 2. 4/12 = 2. 7/12
3) 2. 7/12 + 4. 2/5 = 2. 35/60 + 4. 24/60 = 6. 59/60
2.
1) 1. 1/3 + 2/3 = 1. 3/3 = 2
2) 4. 4/5 + 2 = 6. 4/5
3) 6. 4/5 + 3/4 = 6. 16/20 + 15/20 = 6. 31/20 = 7. 11/20
3.
1) 1 + 3 = 4
2) 4 + 3/4 = 4. 3/4
3) 4. 3/4 + 5. 1/7 = 4. 21/28 + 5. 4/28 = 9. 25/28