4 7/12 - 1 5/12 + 2 11/12 = 4 + 7/12 - 1 - 5/12 + 2 + 11/12= 4−1+24 - 1 + 24−1+2 + 7/12−5/12+11/127/12 - 5/12 + 11/127/12−5/12+11/12 = 5 + 7−5+117 - 5 + 117−5+11/12= 5 + 13/12= 5 1/12
Ответ: 5 1/12
4 7/12 - 1 5/12 + 2 11/12 = 4 + 7/12 - 1 - 5/12 + 2 + 11/12
= 4−1+24 - 1 + 24−1+2 + 7/12−5/12+11/127/12 - 5/12 + 11/127/12−5/12+11/12 = 5 + 7−5+117 - 5 + 117−5+11/12
= 5 + 13/12
= 5 1/12
Ответ: 5 1/12