Odpowiedzi

2009-09-06T13:44:13+02:00
10.
21/4 : 5/100 - (pierwiastek z 6,25 + 11/3) * 15/2 + 1,25=
= 21/4 : 5/100 - [ (2,5 + 11/3) *15/2] + 1,25= 105 - [ (25/10 +11/3) *15/2] + 1,25= 105-(185/4)+5/4= 60
120= 100%
60= x
x= (60*100%)/120
x= 50%
12.
8/10 -(1,2 : 12/5 - 4/5) : (-1/8) +2= 8/10 - (1/2 - 4/5) : (-1/8) +2=
= 8/10 - 24/10 +2= 0,4
10=100%
0,4= x
x= 4%
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