vì 7/11>1/5=>7/11+a/b=3(1/5+a/b)
=>7/11+a/b=3/5+3(a/b)
=>7/11-3/5=3(a/b)-a/b
=>2/55=2(a/b)
=>a/b=1/55
vì 7/11>1/5=>7/11+a/b=3(1/5+a/b)
=>7/11+a/b=3/5+3(a/b)
=>7/11-3/5=3(a/b)-a/b
=>2/55=2(a/b)
=>a/b=1/55
cho 2 phan so 7/11 va 5/11 tim phan so a/b sao cho cong cac phan so do voi phan so a/b thi ta dc 1 phan so moi co ti sola 3
cho hai phan so 7/9 va 3/11 tim phan so a/b sao cho dem moi phan so nhan tru cho a/b thi duoc phan so moi co ti so la 5
cho 2 phan so 6/7 va 2/9 tim phan so a/b sao cho khi them a/b vao moi phan so ta duoc hai phan so moi co ti so la 3?
cho 2 phan so 6\7 va 2\9.hay tim phan so a\bsao cho khi them a\b vao moi phan so ta duoc 2 phan so co ti so la 3
cho 2 phân số 6 phan 7 va 2 phan 9 tim phan so a phan b sao khi cho them a phan b vao moi phan so ta duoc 2 phan so co ti la 3
cho 2 so thap phan a va b neu viet them 3,01 vao so a va bot o so b di 3,01 thi duoc 2 so moi co ti so la 4 con neu bot di o a 0,7 va them vao b 0,7 thi ta duoc 2 so moi co ti so la 3 tim hai so a va b
cho hai phan so 5/8 va 4/5 hay tim phan so a/b sao cho khi dem phan so 5/8 +voi phan so a/b va dem phan so 4/5-di phan so a/b thi ta duoc 2 phan so co ti so la 2
Cho hai phan so 7/9va 5/11. Hay tim phan so a/bsao cho dem moiphan so da cho tru diphan so a/bthi duoi hai phan so moi co ti so la 5. Phan so a/b la...
Cho phan so a/b co gia tri bang 3/4 neu giam mau so di 12 don vi va giu nguyen tu so thi duoc phan so moi co gia tri bang 6/7 tim gia tri cua phan so a/b
cho a/b bang 4/5 neu cong them 33 vao tu so va giu nguyen mau son thi duoc phan so moi la 25/41
ai nhanh minh tick
minh can gap chieu nay nop roi xin cac ban giup minh