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Asociati convenabil termenii sumei si efectuati adunarile:
0,25+1,(3)+2,(6)+3,75
1/11+2,(69)+5/3\
0,23+17,2+15,67+9,7

dau 65pcte plus coronita


Răspuns :

0,25+1,(3)+2,(6)+3,75 = 0,25 + 3,75  + 12/9 + 24/9 = 4 + 36/9 = 4 + 4 = 8 

1/11+2,(69)+5/3 = 1/11 + 267/99 + 5/3 = 9/99 + 267/99 + 165/99 = 441/99 =
 4,(45)

0,23+17,2+15,67+9,7 = 0,23 + 15,67 + 17,2 + 9,7 = 15,9 + 26,9 = 42,8 

scoala primara, fractii periodice???


0,25+3,75+1,(3)+2,(6)=4+4=8


0,23+15,67+17,2+9,7=15,9+26,9=15+26+0,9+0,9=41+1,8=42,8


2,(69)=(269-2)/99=267/99=89/33
1/11+89/33+5/3=3/33+89/33+55/33=92/33+55/33=147/33=4,(45)