1, Quy dong mau so cac phan so 5/12,2/3 , 3/4
2,viet cac phan so lan luot bang 5/12, 7/18 va co mau so chung la 36
ai lam dung truoc minh tick cho
viet cac phan so lan luot bang 7 phan 9 va 5 phan 12 va co mau so chung la 36
viet cac phan so lan luot bang 7/9 , 5/12 va co mau so chung la 36
viet cac phan so lan luot bang 13 phan 36 va 17 phan 24 co mau so chung la 72
\(\text{viet cac phan so lan luot bang 5/7; 4 va co mau so chung bang 7}\)
viet cac phan so lan luot bang \(\frac{5}{6}\);\(\frac{3}{4}\)va co mau so chung la 12
A)Viet 5 phan so bé Hon 1,co Mau so la 7 va co tu so lon hon 0:
B)Viet 5 phan so lon hon 1 va co mau so la 5:
C)Viet 5 phan so bang phan so tam phan muoi hai :
D)Viet cac phan so khac 0 co tong cua tu so va mau so bang 7:
E)Hai phan so lon hon 1 co mau so bang 7 la :
G)Hai phan so bang 1 la:
H)Khoanh vao cac phan so bang ba muoi sau phan nam tu: Hai phan ba; sau phan muoi nam;tam phan muoi hai;muoi phan muoi nam
Giai ho minh bai toan nay nhe !Minh dang can bai toan nay trong ngay hom nay.
A LÀ 1/7,2/7,3/7,4/7,5/7
B LÀ 10/5,9/5,8/5,7/5,6/5
C LÀ 2/5,16/20,24/30,32/40,40/50
D LÀ 1/6,2/5,3/4,2/5/1/6
Ch0 em lam toan va tiêng viêt
bai 4 ;Viet hai phan so lan luot bang :
a) 5/7 ;4 va co mau so chung la 7
b) 9/11 ;5 va co mau so chung la 33
Viet phan so : \(\dfrac{5}{7}\) thanh cac phan so co mau so lan luot la: 14 ; 28 ; 35 ; 105
\(\dfrac{10}{14};\dfrac{20}{28};\dfrac{25}{35};\dfrac{75}{105}\)
\(\dfrac{5}{7}=\dfrac{5\times2}{7\times2}=\dfrac{10}{14};\dfrac{5\times4}{7\times4}=\dfrac{20}{28};\dfrac{5\times5}{7\times5}=\dfrac{25}{35};\dfrac{2\times15}{7\times15}=\dfrac{30}{105}\)
viet so tu nhien 13 thanh cac phan so co mau so lan luot la : 3; 5 ; 10 ; 17 .
\(\dfrac{13}{5};\dfrac{13}{3};\dfrac{13}{10};\dfrac{13}{17}\)
\(\dfrac{39}{3};\dfrac{65}{5};\dfrac{130}{10};\dfrac{221}{17}\)