cho cac phan so 7 phan 24, 7 phan 15, 15 phan 7, 13 phan 24, 11 phan 24 . hoi co bao nhieu phan so co mau so giong nhau
viet moi phan so sau thanh tong cac phan so co tu so bang 1 va mau so khac nhau
5/6 7/12 8/15 17/24
giai tri tiet bai toan
Cho phan so 2/11. hoi phai cong them vao tu so va mau so cua phan so do mot so tu nhien la bao nhieu de duoc phan so moi co gia tri bang phan so 4/7
Gọi số tự nhiên phải tìm là a, ta có:
\(\frac{2+a}{11+a}=\frac{4}{7}\)
=> (2 + a) x 7 = (11 + a) x 4
=> 14 + 7 x a = 44 + 4 x a
=> 7 x a - 4 x a = 44 - 14
=> 3 x a = 30
=> a = 30 : 3
=> a = 10
Vậy số tự nhiên phải tìm là 10
Gọi số cần tìm là:x
2+x/11+x=4/7
7(2+x)=4(11+x)
14+7x=44+4x
7x-4x=44-14
3x=30
x=10
Gọi số cần tìm là A, vậy ta có:
\(\frac{2+a}{11+a}=\frac{4}{7}\)
\(\Leftrightarrow\left(2+A\right).7=\left(11+A\right).4\)
\(\Leftrightarrow14+7.A=44+4.A\)
\(\Leftrightarrow7.A-4.A=44-14\)
\(\Leftrightarrow3.A=30\)\(\Leftrightarrow A=10\)
viet cac phan so lan luot bang 13 phan 36 va 17 phan 24 co mau so chung la 72
Viet moi phan so sau thanh tong cac phan so co tu so bang 1 va mau so khac nhau :5/6 ;7/12 ;8/15 ;17/24 giup toi giai toan that nhanh
5/6 = 1/2 + 1/3
7/12 = 1/3 + 1/4
8/15 = 1/3 + 1/5
17/24 = câu này mik suy nghĩ chưa ra
viet cac phan so sau thanh tong cac phan so sau co tu so bang 1 va mau so khac nhau:13/35;11/16;7/18;15/24
\(\frac{13}{35}=\frac{7}{35}+\frac{5}{35}+\frac{1}{35}=\frac{1}{5}+\frac{1}{7}+\frac{1}{35}\)
\(\frac{11}{16}=\frac{8}{16}+\frac{2}{16}+\frac{1}{16}=\frac{1}{2}+\frac{1}{8}+\frac{1}{16}\)
\(\frac{7}{18}=\frac{6}{18}+\frac{1}{18}=\frac{1}{3}+\frac{1}{18}\)
\(\frac{15}{24}=\frac{12}{24}+\frac{3}{24}=\frac{1}{2}+\frac{1}{8}\)
viet moi phan so sau day thanh tong cua ba phan so co tu so la 1 va mau so khac nhau : 7/8 ;11/12 ; 14/24
\(\frac{7}{8}=\frac{1}{8}+\frac{6}{8}=\frac{1}{8}+\frac{2}{8}+\frac{4}{8}=\frac{1}{8}+\frac{1}{4}+\frac{1}{2}\)
\(\frac{11}{12}=\frac{1}{12}+\frac{10}{12}=\frac{1}{12}+\frac{4}{12}+\frac{6}{12}=\frac{1}{12}+\frac{1}{3}+\frac{1}{2}\)
\(\frac{14}{24}=\frac{7}{12}=\frac{1}{12}+\frac{6}{12}=\frac{1}{12}+\frac{4}{12}+\frac{2}{12}=\frac{1}{12}+\frac{1}{3}+\frac{1}{6}\)
OK ban nhe
1. Cho phan so 79/104 . Hoi phai cung phai them tu so va mau so bao nhieu don vi thi ta duoc phan so moi co gia tri bang 4/5
2. Cho phan so 55/92 .hoi phai cung bot tu so va mau so bao nhieu don vi thi ta dc phan so moi co gia tri bang 1/2
3 .cho phan so98/115 . Hoi phai cung bot tu so va mau so bao nhieu don vi thi ta dc phan so moi co gia tri = 4/5
4.Cho phan so 86/105 .hoi phai cung phai bot tu so va mau so bao nhieu dong vi thi ta xc phan so moi co gia tri =3/4
5.cho phan so 67/130 .hoi phai cung phai bot tu so va mau so bao nhieu don vi thi ta dc phan so moico gia tri =2/5
6.cho phan so 59/85. Hoi phai chuyen tu tu so xuong mau so bao nhieu don vi thi ta dc phan so moi co gia tri =1/3
7. Cho phan so 59/109 . Hoi phai chuyen tu mau so len gu so bao nhieu don vi thi ta duoc phan so moi co gia tri =3/4 .
Mai minh se nhan tiep con nhieu de lam co giao phat de ve lam ra tet con di thi !!!!
1..Voi cac chu so 0;1;2;8.Hoi lap duoc bao nhieu so thap phan co du 4 chu so da cho ma co 2 chu so o phan nguyen
2..Voi cac chu so 2;8;1;5.Hoi lap duoc bao nhieu so thap phan co du 4 chu so da cho ma co 2 chu so o phan nguyen
3..Voi cac chu so 0;4;6;8.Hoi lap duoc bao nhieu so thap phan co du 4 chu so da cho ma co 3 chu so o phan thap phan
4..Voi cac chu so 0;2;4;6.Hoi lap duoc bao nhieu so thap phan co du 4 chu so da cho ma co 2 chu so o phan thap phan
mk biết câu 1 thui ,
chắc là 6 nhé :>
tim mot phan so co mau la 11 biet rang khi tu tru 18 va nhan mau voi 7 thi duoc mot phan so bang phan so da chotim mot phan so co mau la 11 biet rang khi tu tru 18 va nhan mau voi 7 thi duoc mot phan so bang phan so da cho