Răspuns:
Explicație pas cu pas:
1 502 × 2 + 1 502 × 9 = 1 502 × ( 2 + 9 ) = 1 502 × 11
311 × 311 × 9 = 311 × ( 311 × 9 ) = 311 × 2 799
3 468 × 104 - 2 × 3 468 - 2 × 3 468 =
= 3 468 × ( 104 - 2 - 2 ) =
= 3 468 × 100
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2003 × a + 2 003 × b = 2 003 × ( a + b ); a, b∈ N*
