wykonaj działanie
a) 42: [ ( 30 - 9 ) x 2 ] =
b ) [ 102 - 2 x (13 + 24 ) ] : 7 =
c ) 3 x ( 31 - 23 ) - 8 x 3 + 9 =


Odpowiedź :

a]

42 : [(30 - 9) * 2] =

= 42 : (21 * 2) = 42 : 42 = 1

b]

[102 - 2 * (13 + 24)] : 7 =

= (102 - 2 * 37) : 7 =

= (102 - 74) : 7 = 28 : 7 = 4

c]

3 * (31 - 23) - 8 * 3 + 9 =

= 3 * 8 - 8 * 3 + 9 =

= 24 - 24 + 9 = 9