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Ariadna20052005
a fost răspuns

(4intregi 2pe5 -3intregi 3pe4)-(8intregi 7pe15 -8intregi 7pe60)=

Răspuns :

Needhelp112
(4 si 2/5 - 3 si 3/4) - (8 si 7/15 - 8 si 7/60) =
= [(4+2/5) - (3+3/4)] - [(8+7/15) - (8+7/60)] = 
= [(20/5+2/5)-(12/4+3/4)] - [(120/15+7/15)-(480/60+7/60)]=
= (22/5-15/4)-(127/15-487/60) = 
= (88/20-75/20)-(508/60-487/60)=
= 13/20 - 21/60 = 
= 13/20 - 7/20 = 
= 6/20 = 
=  3/10

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