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Evalwa
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Fattur
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Problemi Simili mit-Tiftix tal-Web

Sehem

18-18+20-40
Naqqas 12 minn 30 biex tikseb 18.
20-40
Naqqas 18 minn 18 biex tikseb 0.
-20
Naqqas 40 minn 20 biex tikseb -20.