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Dacă a=102 ,b=20, c=203 calculați
A) b ori(a+c).; B) a ori c+ b ori c; C)AB+ac. ; D) bc-ab


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Răspuns :

Salut! :)

a) b × ( a + c ) = 20 × ( 102 + 203 ) = 20 × 305 = 6100

b) a × c + b × c = c × ( a + b ) = 203 × ( 102 + 20 ) = 203 × 122 = 24766

c) ab + ac = a × ( b + c ) = 102 × ( 20 + 203 ) = 102 × 223 = 22746

d) bc - ab = b × ( c - a ) = 20 × ( 203 - 102 ) = 20 × 101 = 2020

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