1. Calculati:
6 supra 12 + 5 supra 15 + 4 supra 24 | 4 1supra 5 + 5 2supra 3 + 6 3 supra 4
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2 supra 40 + 31 supra 320 + 3 supra 160 + 1 supra 64 + 17 supra 160
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11 supra 15 + 3 supra 20 + 54 supra 180 + 7 supra 90 + 13 supra 60
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5 supra 12 + 3 supra 25 + 1 supra 24 + 5 supra 48
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2. Calculati, folosind propietatile adunarii :
