Вычислите:1)4-7\12+1целая5\6+2целых1\3-1целая1\4; 2)6целых3\5-2целых7\15+8целых3\4-1целая1\60; 3)9целых11\18-5целых3\4-1целая15\36+2целых7\9; 4)5целых5\8+8целых3\4-6целых1\5+3.

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1) -2 1/12 + 1 5/6 + 2 1/3 - 1 1/4 = -2 1/12 + 1 5/6 + 2 1/3 - 1 1/4 = -3 - 12/12 + 1 + 10/12 + 2 + 2/3 - 1 - 3/4 = -3 + 3/4 + 2 2/3 - 1
= -3 + 3/4 + 8/3 - 1 = -13/12 + 8/3 - 1 = -13/12 + 32/12 - 12/12
= 7/12

2) 6 3/5 - 2 7/15 + 8 3/4 - 1 1/60 = 6 + 3/5 - 2 - 7/15 + 8 + 3/4 - 1 - 1/60 = 6 + 24/60 - 2 - 28/60 + 8 + 45/60 - 1 - 1/60 = 6 + 24/60 - 2 - 28/60 + 8 + 45/60 - 1 - 1/60
= 6 + 3/5 - 2 - 7/15 + 8 + 3/4 - 1
= 6 + 24/60 - 2 - 28/60 + 8 + 45/60 - 1 - 1/60
= 6 + 3/5 - 2 - 7/15 + 8 + 3/4 - 1
= 6 + 24/60 - 2 - 28/60 + 8 + 45/60 - 1 - 1/60
= 5 427/1405

3) 9 11/18 - 5 3/4 - 1 15/36 + 2 7/9 = 9 + 11/18 - 5 - 3/4 - 1 - 5/12 + 2 + 7/9 = 9 + 33/36 - 5 - 9/12 - 1 - 5/12 + 2 + 7/9 = 9 + 33/36 - 5 - 9/12 - 1 - 5/12 + 2 + 7/9
= 9 + 11/18 - 5 - 3/4 - 1 - 15/36 + 2 + 7/9
= 9 + 33/36 - 5 - 9/12 - 1 - 5/12 + 2 + 7/9
= 9 + 11/18 - 5 - 3/4 - 1 - 5/12 + 2 + 7/9
= 9 + 33/36 - 5 - 9/12 - 1 - 5/12 + 2 + 7/9
= 5 261/252

4) 5 5/8 + 8 3/4 - 6 1/5 + 3 = 5 + 5/8 + 8 + 3/4 - 6 - 1/5 + 3 = 5 + 5/8 + 8 + 3/4 - 6 - 1/5 + 3 = 5 + 5/8 + 8 + 3/4 - 6 - 1/5 + 3
= 5 + 5/8 + 8 + 3/4 - 6 - 1/5 + 3
= 5 + 5/8 + 8 + 3/4 - 6 - 1/5 + 3
= 5 + 5/8 + 8 + 3/4 - 6 - 1/5 + 3
= 5 + 5/8 + 8 + 3/4 - 6 - 1/5 + 3
= 9 563/40