Пошаговое объяснение:
1.
1) 1. 3/5 + 1,8 = 8/5 + 1,8 = 1,6 + 1,8 = 3,4
2) 3,4 * 1/2 = 3,4 * 0,5 = 1,7
2.
1) 6 - 4. 8/15 = 5. 15/15 -
4. 8/15 = 1. 7/15
2) 1. 7/15 : 2,2 =
1. 7/15 : 2. 2/10 =
22/15 : 22/10 = 22/15 * 10/22 = 10/15 = 2/3
3.
1) 1,25 + 1/6 =
1. 25/100 + 1/6 =
1. 1/4 + 1/6 = 1. 3/12 + 2/12 = 1. 5/12
2) 1. 5/12 * 2,4 =
1. 5/12 * 2. 4/10 =
17/12 * 24/10 = 17/1 * 2/10 = 34/10 = 3. 4/10 = 3. 2/5 или 3,4
4.
1) 5,4 - 2. 1/3 =
5. 4/10 - 2. 1/3 =
5. 12/30 - 2. 10/30 =
3. 2/30 = 3. 1/15
2) 3. 1/15 : 7. 2/3 =
46/15 : 23/3 = 46/15 * 3/23 = 2/5 * 1/1 = 2/5
Пошаговое объяснение:
1.
1) 1. 3/5 + 1,8 = 8/5 + 1,8 = 1,6 + 1,8 = 3,4
2) 3,4 * 1/2 = 3,4 * 0,5 = 1,7
2.
1) 6 - 4. 8/15 = 5. 15/15 -
4. 8/15 = 1. 7/15
2) 1. 7/15 : 2,2 =
1. 7/15 : 2. 2/10 =
22/15 : 22/10 = 22/15 * 10/22 = 10/15 = 2/3
3.
1) 1,25 + 1/6 =
1. 25/100 + 1/6 =
1. 1/4 + 1/6 = 1. 3/12 + 2/12 = 1. 5/12
2) 1. 5/12 * 2,4 =
1. 5/12 * 2. 4/10 =
17/12 * 24/10 = 17/1 * 2/10 = 34/10 = 3. 4/10 = 3. 2/5 или 3,4
4.
1) 5,4 - 2. 1/3 =
5. 4/10 - 2. 1/3 =
5. 12/30 - 2. 10/30 =
3. 2/30 = 3. 1/15
2) 3. 1/15 : 7. 2/3 =
46/15 : 23/3 = 46/15 * 3/23 = 2/5 * 1/1 = 2/5