\(\frac{5}{9}=\frac{10}{18}=\frac{15}{27}=\frac{20}{36}=\frac{25}{45}\)
\(\frac{15}{19}=\frac{30}{38}=\frac{45}{57}=\frac{60}{76}=\frac{75}{95}=\frac{90}{114}\)
tim mot phan so bang phan so 9/10 neu tu so cua phan so tru di 15 va giu nguyen mau so thi ta duoc phan so moi bang phan so 3/4
tim 3 phan so:
a)bang phan so 7/9
b)bang phan so 23/37
tim mot phan so biet tong cua tu so va mau so cua phan so do bang 162 va biet phan so do co gia tri bang 4/5
tim phan so do
Cac phan so
5 / 9 ; 15 / 45 ; 3 / 7 ; 11 / 19 ; 16 / 31
phan so nao bang phan so 1 / 3
tim cac phan so co tu so be hon 30 va: bang phan so 5/3 va bang phan so 4/7 dang cAN GAP
tim mot phan so biet tong cua tu so va mau so cua phan so do bang 162 va biet phan so do bang phan so 4/5
Tim mot phan so biet tong cua tu so va mau so cua phan so do bang 162 va biet phan so do co gia tri bang 4/5
tim cac phan so bang nhautrong cac phan so day :2:5 ; 4:7; 6:15; 8:14; 16:28; 24:60;
Mot phan so bang phan so 4/5 co tong cua tu va mau so la 198 tim phan so do