Пошаговое объяснение:
1)
1/2+2/3+3/4 = 6+8+9/12 = 23/12 = 1 11/12
2)
1/3+1/4+15 = 4+3+180/12 = 187/12 = 15 7/12
3)
7/8+2/3+1/6 = 21+16+4/24 = 41/24 = 1 17/24
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Пошаговое объяснение:
1)
1/2+2/3+3/4 = 6+8+9/12 = 23/12 = 1 11/12
2)
1/3+1/4+15 = 4+3+180/12 = 187/12 = 15 7/12
3)
7/8+2/3+1/6 = 21+16+4/24 = 41/24 = 1 17/24