so sanh hai phan so 15/47 va 21/65
so sanh hai phan so 47/15 va 65/21
\(-TA\)\(CÓ\)\(:\)
\(\frac{47}{15}\): \(\frac{65}{21}\)\(=\frac{329}{325}\)
khong quy dong TS va MS so sanh hai phan so 47/15 va 65/21
khong quy dong tu so va mau so va so sanh hai phan so 47/15 va 65/21
so sanh 2 phan so 15/47 va 21/65
\(\frac{15}{47}< \frac{21}{65}\)
tt với Ziiz nha
bai 1: so sanh cac phan so sau:
a) 10/17 va 5/8 b) 49/59 va 63/73 c) 12/19 va 11/21
d) 23/27 va 23231/27271 e) 13/37 va 21/65 g) 47/15 va 65/21
khong quy dong mau so tu so hay so sANH CAC PHAN SO SAU
207/209va 209/211
101/100 va 103/101
79/65va 15/17
47/15 va 65/21
ban nao giai ca bai viet ca loi giai ra minh tick nhe
1: so sanh cac phan so sau:
a) 10/17 va 5/8 b) 49/59 va 63/73 c) 12/19 va 11/21
d) 23/27 va 23231/27271 e) 13/37 va 21/65 g) 47/15 va 65/21
a/ 10/7 < 5/8 b/ 49/59 < 63/73 c/12/19 > 11/21
d/ 23/27 < 23231/27271 e/ 13/37 > 21/65 g/ 47/15 > 65/21
mik co the lam sai day ban mho kiem tra lai nhe!
Khong quy dong mau so hay so sanh hai phan so 12 phan 49 va 13 phan 47
Vì \(\frac{12}{49}< \frac{13}{49}\)
\(\frac{13}{49}< \frac{13}{47}\)
Nên \(\frac{12}{49}< \frac{13}{47}\)
Ta có 13/47>13/49
Mà 13/49>12/49
=> 12/49<13/47
\(\frac{12}{49}\)và \(\frac{13}{47}\Rightarrow12.47\)và \(49.13\)\(\Rightarrow564\)và \(637\)
vì 564<637
nên \(\frac{12}{49}< \frac{13}{47}\)
Khong can quy dongmau so,hay so sanh cac phan so sau:
17/15 va 29/30
12/48 va 13/47
15/22 va 60/91
+ Ta có:
17/15 > 1; 29/30 < 1
=> 17/15 > 29/30
+ Ta có:
12/48 < 12/47 < 13/47
=> 12/48 < 13/47
+ 15/22 = 60/88 > 60/91
=> 15/22 > 60/91
so sanh hai phan so -31/19 va -21/29