Răspuns:
Explicație pas cu pas:
4/9 - (-1/6) = 4/9 + 1/6 = 8/18 + 3/18 = 11/18
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-5/8 - (-7/10) = -5/8 + 7/10 = -25/40 + 28/40 = 3/40
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7/12 - 17/18 = 21/36 - 34/36 = -13/36
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-9/20 - 4/15 = -27/60 - 16/60 = -43/60
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3/10 - 8/15 = 9/30 - 16/30 = -7/30
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-11/25 - (-3/10) = -11/25 + 3/10 = -22/50 + 15/50 = -7/50
