Răspuns:
0,4=(4/10)⁽²=2/5
0,0(6)=(6/90)⁽⁶=1/15
1,(3)=(13-1)/9=(12/9)⁽³=4/3
(³⁾2/5-1/15)²:4/3=(6/15-1/15)²·3/4=(5/15)²·3/4=(1/3)²·3/4=1/9·3/4=1/12
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f=9/32·[(5·3+2)/3-4/21:4/7]
f=9/32·(17/3-4/21·7/4)
f=9/32·(17/3-1/3)
f=9/32·16/3
f=(144/96)⁽⁴⁸
f=3/2
15/10=3/2
15·2=10·3=>30=30 → echivalente
