rut gon roi quy dong ; 212121/ 353535 va 131313/141414
rut gon roi quy dong mau cac ps sau
A=2002/2000.16-1970
B=1.2.3+2.4.6+4.8.12+7.14.21/1.3.6+2.6.12+4.12.24+7.21.42
rut gon phan so sau roi quy dong
a -15/90; 120/600; -75/150
b 54/-90;-180/288;60/-135
Giup minh voi!
Rut gon roi quy dong mau cac phan so sau:
3 . 4 + 3 . 7/6 .5 + 9 va 6 . 9 - 2 . 17/63. 3 - 119
\(\frac{3.4+3}{6.5+9}=\frac{3.(4+1)}{3.10.3.3}=\frac{3.5}{3.(10+3)}=\frac{3.5}{3.13}=\frac{5}{14}\)
\(\frac{6 . 9 - 2.17}{63 . 3 - 119}=\frac{3 . ( 17 + 1 )-2 . 17}{189 - 119}\)
\(=\frac{3.17+3-2.17}{70}=\frac{\left(3-2\right).17+3}{70}\)
\(=\frac{17+3}{70}=\frac{20}{70}=\frac{2}{7}\)
Khong dung may tinh bo tui .Rut gon roi quy dong cac phan so sau
a)\(\frac{17}{20},\frac{13}{15}va\frac{41}{60}\)
b)\(\frac{25}{75},\frac{17}{34}va\frac{121}{132}\)
quy dong mau so roi rut ra nhan xet:
13/55;47/73
13/55=949/4015
47/73=2585/4015
949<2585
Suy ra 13/55<47/73
TINH ROI RUT GON
rut gon roi quy dong mau cac phan so ; a) 212121/353535 vs 131313/ 141414
212121/353535=212121:10101/353535:10101=21/35=3/5
131313/141414=131313:10101/141414:10101=13/14
3/5=3x14/5x14=42/70=3/5
13/14=13x5/14x5=65/72=13/14
rút gọn: +) 212121/353535= 3*7*10101/ 5*7*10101= 3/5
+) 131313/141414= 13*10101/ 14*10101= 13/14
quy đồng: +) 3/5= 3*14/5*14= 42/70
+) 13/14=13*5/14*5=65/70
212121/353535=141414/353535=10101/353535
1-131313/141414=10101/141414
Vì
10101/141414>10101/353535
Nên
212121/353535>131313/141414
rut gon roi quy dong va phan so
34 phan 5i va 38 phan 95 msc
54 phan 36 va 26 phan 39 msc
42 phan 28 va 27 phan 45 msc
33 phan 25 va 25 phan 75 msc
21 phan 35 va 18 phan 24 msc
33 phan 77 va 25 phan 75
thế nào vậy Lê Trâm Anh?
ko chi thi thoi
Bo ngoac roi rut gon:-a-(b-a-c)