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Calculati:
a)9/50+2/75-3/100=
b)8/21+11/24-5/27=
c)2 intreg 2/3+4/5-1 intreg 13/15=
d)5 intreg 11/12-1 intreg 3/4 -2 intreg2/3=
Va rag urgent!!!


Răspuns :

a)9/50+2/75-3/100=
=(9*6+2*4-3*3)/300=
=(54+8-9)/300=
=53/300

b)8/21+11/24-5/27=
=(8*72+11*63-5*56)/1512=
=(576+693-280)/1512=
=989/1512

c)2 intreg 2/3+4/5-1 intreg 13/15=
=8/3+4/5-28/15=
=(8*5+4*3-28)/15=
=(40+12-28)/15=
=24/15=
=8/5

d)5 intreg 11/12-1 intreg 3/4 -2 intreg2/3=
=71/12-7/4-8/3=
=(71-7*3-8*4)/12=
=(71-21-32)/12=
=18/12=
=3/2