Verified answer

1. |a| - |b| = |-14,9| - |8,2| = 14,9 - 8,2 = 6,7

2. |a| : |b| = |-3 7/9| : |-11/6| = 3 7/9 : 11/6 = 34/9 * 6/11 = 68/33 = 2 2/33

3. |a| + |b| = |1/5| + |-3 5/7| = 1/5 + 3 5/7 = 1/5 + 26/7 = 7/35 + 130/35 = 137/35 = 3 32/35

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