liczba 20 jest wartoscia wyrazenia: a (78-66:11)-2do potegi 3 , b 3razy0+6razy4-32:8 , c (45+5razy3):(33-28) , d 3 do petegi2-(28-3razy7)
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a (78-66:11)-2do potegi 3 = 72 - 8 = 64
b 3razy0+6razy4-32:8 = 0 + 24 - 4 = 20
c (45+5razy3):(33-28) = 60 : 5 = 12
d 3 do petegi2-(28-3razy7) = 9 - ( 28 - 21 ) = 9 - 7 = 2
odp; B
(78-66:11)-2 do potegi3
(78-6)-2
72-2=70
70 do potegi3=210
3x0+6x4-32:8
0+24-4
24-4=20
(45+5x3):(33-28)
15+45:5
60:5=12
3 do potegi 2-(28-3x7)
6-28-21=1