فضاء التلاميذ والأساتذة والطلبة

200 = 40 gr 12 T 1800 = 300 — = 33,33 gr 360 50 200 36- 180 — = 220,5: 200 = 25 gr 180 157 180 12 45' 50 16.66gr 25 gr ABC — I 12 50 gr = ................
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