Odpowiedź:
A
( 1 2/3 * 3 - 1,5² : 4,5) : 2 = ( 5/3 * 3 - 2,25 : 4,5) : 2 = (5 - 0,5) : 2 = 4,5 : 2 = 2,25
B
[(1,5 + 2/3 ) : 2 1/6]/(3/4 - 0,5) = [(15/10 + 2/3) : 13/6]/(3/4 - 1/2) =
= [(3/2 + 2/3) : 13/6]/(3/4 - 2/4) = (9/6 + 4/6) : 13/6]/(1/4) = (13/6 * 6/13) : 1/4 =
= 1 : 1/4 = 1 * 4 = 4
C
(2/3 + 0,5 : 3)/(0,2 + 5/6) = (2/3 + 1/2 * 1/3)/(2/10 + 5/6) = (2/3 + 1/6)/(1/5 + 5/6) =
= (4/6 + 1/6)/(6/30 + 25/30) = 5/6 : 31/30 = 5/6 * 30/31 = 5 * 5/31 = 25/31
D
0,6/[(2,5 - 1 2/3) * 1/6] = 0,6/(2 1/2 - 1 2/3) * 1/6] = 0,6/[(2 3/6 - 1 4/6) * 1/6] =
= 0,6/[(1 9/6 - 1 4/6) * 1/6] = 0,6/(5/6 * 1/6) = 0,6 : 5/36 = 6/10 * 36/5 =
= 3/5 * 36/5 = 108/25 = 4 8/25
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Odpowiedź:
A
( 1 2/3 * 3 - 1,5² : 4,5) : 2 = ( 5/3 * 3 - 2,25 : 4,5) : 2 = (5 - 0,5) : 2 = 4,5 : 2 = 2,25
B
[(1,5 + 2/3 ) : 2 1/6]/(3/4 - 0,5) = [(15/10 + 2/3) : 13/6]/(3/4 - 1/2) =
= [(3/2 + 2/3) : 13/6]/(3/4 - 2/4) = (9/6 + 4/6) : 13/6]/(1/4) = (13/6 * 6/13) : 1/4 =
= 1 : 1/4 = 1 * 4 = 4
C
(2/3 + 0,5 : 3)/(0,2 + 5/6) = (2/3 + 1/2 * 1/3)/(2/10 + 5/6) = (2/3 + 1/6)/(1/5 + 5/6) =
= (4/6 + 1/6)/(6/30 + 25/30) = 5/6 : 31/30 = 5/6 * 30/31 = 5 * 5/31 = 25/31
D
0,6/[(2,5 - 1 2/3) * 1/6] = 0,6/(2 1/2 - 1 2/3) * 1/6] = 0,6/[(2 3/6 - 1 4/6) * 1/6] =
= 0,6/[(1 9/6 - 1 4/6) * 1/6] = 0,6/(5/6 * 1/6) = 0,6 : 5/36 = 6/10 * 36/5 =
= 3/5 * 36/5 = 108/25 = 4 8/25