Răspuns:
Explicație pas cu pas:
a)
417 × 38 + ( 583 × 11 + 583 × 27 ) = 38 000
= 417 × 38 + 583 × ( 11 + 27 ) =
= 417 × 38 + 583 × 38 =
= 38 × ( 417 + 583 ) =
= 38 × 1 000 =
= 38 000
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b)
12 × 17 + 35 × 13 + 17 × 23 = 1 050
17 × ( 12 + 23) + 35 × 13 =
= 17 × 35 + 35 × 13 =
= 35 × ( 17 + 13 ) =
= 35 × 30 =
= 1050
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c)
( 37 × 26 + 58 × 34 ) + 21 × 26 = 3 480
= 26 × ( 37 + 21 ) + 58 × 34 =
= 26 × 58 + 58 × 34 =
= 58 × ( 26 + 34 ) =
= 58 × 60 =
= 3 480
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d)
( 2^6 × 74 + 102 × 10 ) + 64 × 26 = 7 420
= 64 × 74 + 102 × 10 + 64 × 26 =
= 64 × ( 74 + 26 ) + 102 × 10 =
= 64 × 100 + 102 × 10 =
= 6 400 + 1 020 =
= 7 420
