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1.Transformati in fractie zecimala periodica: 13/9 si 137/45.
2.0,6X1 7 supra18
3. 1+2+3+...+73 =
336:(7 la puterea 2+0 la puterea 7-5 la puterea 2)=


Răspuns :

1.Transformati in fractie zecimala periodica:
13/9=1,(4)
137/45=3,0(4)

2.0,6X17/18=0,5(6)
3. 1+2+3+...+73 =73(73+1)/2=2701

336:(7²+0⁷-5²)=
336:(49+0-25)=336:24=14