Răspuns :

a) a×c=12

b×d=30

a×b×c×d=

=(a×c)×(b×d)=

=12×30=360

b) 7ac-2bd=

=7×12-2×30=

=84-60=24

c) 15ac:2bd=

=(15×12):(2×30)=

=180:60=3

IoNuTz3Did

Răspuns:

Explicație pas cu pas:

a × c = 12

b × d = 30

a) a × b × c × d = a × c × b × d = 12 × 30 = 360

b) 7ac - 2bd = 7 × 12 - 2 ×30 = 84 - 60 = 24

c) 15ac : 2bd = (15 × 12) : (2 × 30) = 180 : 60 = 3

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