1.
a. 1/2, 2/4, 3/6, 4/8, 5/10
b. 3/1, 6/2, 9/3
c. 1/3, 3/5, 5/7, 7/9
d. 1/2, 1/4, 1/6, 1/8, 1/10, 2/4, 2/6, 2/8, 2/10, 3/4, 3/6, 3/8, 3/10, 4/6, 4/8, 5/10, 5/6, 5/8, 5/10, 6/8, 6/10, 7/8, 7/10, 8/10, 9/10.
2.
patrimea
1/2 din 4 timpi= 2 timpi
1/4 din 4 timpi= 1 timp
3.
4/4=3/4+1/4
daca 3/4=6 => 1/4=6:3=2
4/4=6+2=8m are intreaga sfoara
4.
5/5=2/5+3/5
daca 2/5 reprezinta 180=>1/5=180:2=90litri
3/5=90x3=270litri
180+270=450litri incap in butoi
5.
3/9 din 648=648:9x3=72x3=216 visini
648-216=432 restul
3/6 din 432=432:6x3=72x3=216 caisi
1/4 din 216=216:4=54 pruni
648-(216+216+54)=648-486=162 ciresi
6.
7/7-5/7=2/7
1/7=630:5=126 trandafiri
2/7=126x2=252 restul de flori
630+252=882 flori au fost plantate in parc
7.
3/8 din 504=504:8x3=63x3=189 ziare s-au vandut dimineata
2/8 din 504=504:8x3=63x2=126 ziare s-au vandut dupa amiaza
504-(189+126)=504-315=189 ziare au ramas
La o ferma sunt 500 de pasari de curte (rate, gaini su curci). Dintre ele 1/5 sunt rate, iar 2/5 sunt curci. Cate gaini sunt in ferma?
1/5 din 500=500:5=100 rate
2/5 din 500=500:5x2=100x2=200 curci
500-(100+200)=500-300=200 gaini
