Răspuns:
Explicație pas cu pas:
3/9 + 4/9 = 7/9
2/15 + 3/15 + 4/15 = 9/15 = 3/5
17/24 - 5/24 = 12/24 = 1/2
15/8 - 9/8 + 2/8 = 8/8 = 1
23/40 - (11/40 + 9/40) = 23/40 - 20/40 = 3/40
1 + (12/16 - 9/16) = 1 + 3/16 = 16/16 + 3/16 = 19/16
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a + 5/6 = 11/6
a = 11/6 - 5/6 = 6/6 = 1
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17/9 - b = 11/9
b = 17/9 - 11/9 = 6/9 = 2/3
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(7/8 - 1/8) - c = 2/8
6/8 - c = 2/8
c = 6/8 - 2/8 = 4/8 = 1/2
