mot bien doi co 180 doi vien, chia thanh cac phan doi co 8 hoac 9 doi vien. Biet rang so doi vien trong cac phan doi co 8 ban nhieu hon so doi vien trong cac phan doi co chin ban . Hoi co bao nhieu phan doi moi loai.
nho viet cach iai ra nhe
cam on
cac ban nao biet giai bai toan nay k?De bai nhu sau:viet 3 phan so khac nhau co cung mau so ma moi phan so do:1 la lon hon phan so 1/5,2 la be hon phan so 1/4 va 3 la lon hon phan so 1/5,be hon phan so 1/4
cho minh hoi phan so nao co tu so la 11 ma lai lon hon phan so 6 phan 13 ma lai nho hon phan so 6 phan 12
cho cac phan so 7/30 , 9/100 , 15/75 ,41 / 900 , 10/ 41 . Trong cac phan so da cho phan so nao co the chuuyen thanh phan so thap phan ? hay chuyen cac phan so so do thanh phan so thap phan
bai giai
viet phan so 3/5 duoi dang phan so thap phan co mau so la 10va co mau so la 100
viet hai phan so thap phan moi tim duoc thanh phan so thap phan
co the 3/5 thanh nhung phan so nao
viet phan so 3/5 duoi dang so thap phan co mau so la 10 va co mau so la 100 .
b viet hai phan so thap phan moi tim duoc thanh hai so thap phan
c co the viet 3/5 thanh nhung so thap phan nao
cap phan so nao co the co the rut gon thanh hai phan so co mau la 100
So cac so thap phan co 3 chu so phan thap phan ma cac so do lon hon 10 va nho hon 11 la
a viet phan so 3/5 duoi dang phan so thap phan co mau so la 10 va co mau so la 100
b viet hai phan so thap phan moi tim duoc thanh hai so thap phan
c co the viet 3/5 thanh nhung so thap phan nao