cho phan so a/b (a<b) cung them m don vị vào tu va mau thi phan so moi lon hon hay be hon a/b
cho phan so 6/7 cung bot tu va mau di 4 don vi thi duoc phan so moi hon hay be hon 6/7
so sánh a/b với a-m/b-m với 0<a<b
giai giup mk nha
can lien
thank you
cho tap hop A la tap hop cac so tu nhien chan lon hon 20 va be hon 30 B la tap hop lon hon 2 va be hon 33 so phan tu thuoc tap hop C thuoc B ma khong thuoc A
1 phan so co mau so lon hon tu so 2 don vi va mau gap 15/4 tu so .Tim phan so do
tim phan so co tong va tu so va mau so bang 25 , mau so lon hon 7 don vi
5 phan so co tu va mau cung duongsao cho cac phan so do lon hon 1/6va nho hon2/3
tim phan so bang phan so am 21 phan 35 va tong cua tu lon hon mau la 32 don vi
Cho phân số -5/9
a) hoi phai cong them vao mau va bot di vao tu cho cung mot so nao e duoc phan so moi co gia ri bang phanso -7/12
b) hay tim mot so nao sao cho khi cong so do vao tu hthem vao mau hai lan so do thi duoc phan so co gia tri bang 1/3
viet cac tap hop sau bang cach liet ke phan tu va chi ra moi tap hop co bao nhieu phan tu .
a, tap hop A cac so tu nhien co 2 chu so trong do chu so hang chuc lon hon chu so hang don vi la 2 .
b, tap hop B cac so tu nhien co 3 chu so bang 3 .