Răspuns:
Explicație pas cu pas:
48 × 15 × 5 = ( 48 × 5 ) × 15 = 240 × 15 = 3 600 → primul mod
= 48 × ( 15 × 5 ) = 48 × 75 = 3 600 → al doilea mod
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137 × 25 × 3 = 137 × ( 25 × 3 ) = 137 × 75 = 10 275 → primul mod
= ( 137 × 3 ) × 25 = 411 × 25 = 10 275 → al doilea mod
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278 × 13 × 4 = 278 × ( 13 × 4 ) = 278 × 52 = 14 456
= ( 278 × 4 ) × 13 = 1 112 × 13 = 14 456
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19 × 5 × 679 = 19 × ( 5 × 679 ) = 19 × 3 395 = 64 505 → primul mod
= ( 19 × 5 ) × 679 = 95 × 679 = 64 505 → al doilea mod
