1) 2 1//52 * 26//49=15//14=1 1//14
2) 3 3//7 : 1 5//11=33/14=2 5//14
3) 1 1//14 - 2 5//14= -9//7 = -1 2//7
ответ: -1 2//7
1) 2 1//52 * 26//49=15//14=1 1//14
2) 3 3//7 : 1 5//11=33/14=2 5//14
3) 1 1//14 - 2 5//14= -9//7 = -1 2//7
ответ: -1 2//7