39 × 76 + 39 × 128 = 2 964 + 4 992 = 7 956 → primul mod
→ dau factor comun pe 39
= 39 × ( 76 + 128 ) = 39 × 204 = 7 956 → al doilea mod
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75 × 208 - 75 × 138 = 15 600 - 10 350 = 5 250 → primul mod
= 75 × ( 208 - 138 ) = 75 × 70 = 5 250
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324 × 15 + 324 × 25 = 4 860 + 8 100 = 12 960 → primul mod
= 324 × ( 15 + 25 ) = 324 × 40 = 12 960 → al doilea mod
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Diferenta produselor ( semnul lipsa ,, minus ")
57 × 120 - 57 × 45 = 6 840 - 2 565 = 4 275 → primul mod
= 57 × ( 120 - 45 ) = 57 × 75 = 4 275 → al doilea mod
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Suma produselor ( semnul lipsa = ,,plus " )
57 × 120 + 57 × 45 = 6 840 + 2 565 = 9 405 → primul mod
= 57 × ( 120 + 45 ) = 57 × 165 = 9 405 → al doilea mod
