Пошаговое объяснение:
1.
1) 3. 1/3 + 2,5 = 3. 1/3 + 2. 5/10 = 3. 10/30 + 2. 15/30 = 5. 25/30 = 5. 5/6
2) 4,6 - 2. 1/3 = 4. 6/10 - 2. 1/3 = 4. 18/30 - 2. 10/30 = 2. 8/30 = 2. 4/15
3) 5. 5/6 * 2. 4/15 = 35/6 * 34/15 = 7/3 * 17/3 = 119/9 = 13. 2/9
2.
1) 4,5 * 1. 2/3 = 4. 5/10 * 1. 2/3 = 45/10 * 5/3 = 15/2 * 1/1 = 15/2 = 7,5
2) 7,5 - 6,75 = 0,75
3) 0,75 * 1. 1/3 = 75/100 * 4/3 = 3/4 * 4/3 = 12/12 = 1
Пошаговое объяснение:
1.
1) 3. 1/3 + 2,5 = 3. 1/3 + 2. 5/10 = 3. 10/30 + 2. 15/30 = 5. 25/30 = 5. 5/6
2) 4,6 - 2. 1/3 = 4. 6/10 - 2. 1/3 = 4. 18/30 - 2. 10/30 = 2. 8/30 = 2. 4/15
3) 5. 5/6 * 2. 4/15 = 35/6 * 34/15 = 7/3 * 17/3 = 119/9 = 13. 2/9
2.
1) 4,5 * 1. 2/3 = 4. 5/10 * 1. 2/3 = 45/10 * 5/3 = 15/2 * 1/1 = 15/2 = 7,5
2) 7,5 - 6,75 = 0,75
3) 0,75 * 1. 1/3 = 75/100 * 4/3 = 3/4 * 4/3 = 12/12 = 1