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Ajutoor
1.Calculati si aratati cu cat ati amplificat :
a) 7/180+7/84+11/210
ps: aceasta bara (/) inseamna supra
repedee
15 puncte+coroanaaa


Răspuns :

7/180+7/84+11/210=
180=2²x3²x5
84=
2²x3x7
210=
2x3x5x7
cmmmc=2²x3²x5x7=1260
=(7*7+7*15+11*6)/1260=
=(49+105+66)/1260=
=220/1260=
=22/126=
=11/63