so cac so thap phan co 3 chu so o phan thap phan ma cac so do lon hon 10 va be hon 11
viet cac phan so lon hon 4/9 va be hon 1
biet so A lon hon trung binh cong cua so A va cac so 1986 1999 2013 la 32 tim so A
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
1. Cho cac so 2,5,7,9. Hay viet tat ca cac so thap phan lon hon 2 va be hon 5.
2. Cho cac so 2, 17, 47, 92, 152....Hay tim so hang thu 100 cua day
tim cac phan so lon hon 5 phamn 6 va be hon 11 phan 12 ma co mau so la 48
tim so thap phan lon hon 6 va be hon 7 biet rang so do co hai cho so khac o phan thap phan va tong cac chu so o phan thap phan bang chu so o phan nguyen
Dung dau phay de bien doi cac thua so cua tich 1204 * 75 sao cho tich la mot so tu nhien be hon 1000 va lon hon 900
Dung dau phay de bien doi cac thua so cua tich 1204 x 75 sao cho tich la 1 so tu nhien be hon 1000 va lon hon 900