Пошаговое объяснение:
а) 1. 4/9 + 2. 5/18 = 1. 8/18 + 2. 5/18 = 3. 13/18
б) 3. 5/24 - 1. 7/36 = 3. 15/72 - 1. 14/72 =
2. 1/72
в) 2. 7/30 + 3. 9/20 - 4. 59/60 =
2. 14/60 + 3. 27/60 - 4. 59/60 =
5. 41/60 - 4. 59/60 = 4. 101/60 - 4. 59/60 = 42/60 = 7/10
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Пошаговое объяснение:
а) 1. 4/9 + 2. 5/18 = 1. 8/18 + 2. 5/18 = 3. 13/18
б) 3. 5/24 - 1. 7/36 = 3. 15/72 - 1. 14/72 =
2. 1/72
в) 2. 7/30 + 3. 9/20 - 4. 59/60 =
2. 14/60 + 3. 27/60 - 4. 59/60 =
5. 41/60 - 4. 59/60 = 4. 101/60 - 4. 59/60 = 42/60 = 7/10