Răspuns:
a) 7/8+1/8=8/8, 7/8+3/8=10/8,
7/8+2/8=9/8,
7/8+6/8=13/8, 7/8+4/8=11/8,
7/8+5/8=12/8, 7/8+7/8=14/8
b) 9/9-3/9=6/9, 5/9-3/9=2/9,
6/9-3/9=3/9,
4/9-3/9=1/9, 7/9-3-9=4/9,
8/9-3/9=5/9
Explicație pas cu pas:
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