Question

2,9:19,2x(108,34+11,7)=2 justifica răspunsul

Answer 1

$2,9:19,2*(108,34+11,7)=\:\:\text{(faci mai intai paranteza)}\\ =2,9:19,2*120,04=\:\:\text{(acum transformi toate numerele in fractii ordinare)}\\ =\frac{29}{10}:\frac{192}{10}*\frac{12004}{100}=\\ =\frac{29}{10}*\frac{10}{192}*\frac{12004}{100}=\\ \text{(la impartire se inverseaza fractia si se schimba din : in *)}\\ =\frac{29*10*12004}{10*192*100}=\:\:\text{(se simplifica 10 cu 10)}\\ =\frac{29*12004}{192*100}=\:\:\text{(se simplifica 100 si 12004 cu 4)}\\ =\frac{29*3001}{192*25}=\frac{87029}{4800}=18,131041666666666...$