a.Sap xep cac phan so sau theo thu tu tu lon den be. 9/7,7/8,6/7,9/5
b.Sap xep cac phan so sau theo thu tu tu be den lon.4/3,1/2,6/5,5/12
a từ lớn đến bé : 9/7, 7/8,6/7,9/5
b thu tu tu be den lon.5/12 , 1/2 , 6/5, 4/3
sap xep cac phan so sau theo thu tu tăng dan
-5/7 ; 7/10 ; -16/19 ; 20/23 ; 214/315 ; 205/107
\(\dfrac{-5}{7}=\dfrac{-5\cdot19}{7\cdot19}=\dfrac{-95}{133}\)
\(\dfrac{-16}{19}=\dfrac{-16\cdot7}{19\cdot7}=\dfrac{-112}{133}\)
mà -95>-112
nên \(-\dfrac{16}{19}< -\dfrac{5}{7}\)(1)
\(-\dfrac{5}{7}< 0\)
\(0< \dfrac{214}{315}\)
Do đó: \(-\dfrac{5}{7}< \dfrac{214}{315}\left(3\right)\)
\(\dfrac{214}{315}< \dfrac{220.5}{315}=\dfrac{7}{10}\)(2)
\(\dfrac{7}{10}=1-\dfrac{3}{10}\)
\(\dfrac{20}{23}=1-\dfrac{3}{23}\)
ta có: \(\dfrac{3}{10}>\dfrac{3}{23}\)
=>\(-\dfrac{3}{10}< -\dfrac{3}{23}\)
=>\(-\dfrac{3}{10}+1< -\dfrac{3}{23}+1\)
=>\(\dfrac{7}{10}< \dfrac{20}{23}\)(4)
\(\dfrac{20}{23}< 1\)
\(1< \dfrac{205}{107}\)
DO đó: \(\dfrac{20}{23}< \dfrac{205}{107}\)(5)
Từ (1),(2),(3),(4),(5) suy ra \(\dfrac{-16}{19}< -\dfrac{5}{7}< \dfrac{214}{315}< \dfrac{7}{10}< \dfrac{20}{23}< \dfrac{205}{107}\)
bai 1.A,sap xep cac phan so sau day theo thu tu tu lon den be ;5/6,13/8,8/9 ,1/3 ,3/2 ;B,tim tat ca cac phan so sau cho mau so la so co 2 chu so . Cac ban giup to nhe .
xep cac so sau theo thu tu tu be den lon : 0,5 km ; 0,320 km ; 432 m ; 385/1000 km.
xep cac so thap phan sau theo thu tu lon dan : 8,132 ; 7,645 ; 8,231 ; 9,01 ; 7, 546.
0,320 km --> 385/1000 km --> 432m --> 0,5 km
7,546 -> 7,645 -> 8,132 -> 8,231 -> 9,01
Cho cac phan so sau:
80/79,29/28,2013/2012,112/111
Hay xep cac phan so sau theo thu tu tu lon den be
Chocac chu so 1;2;0.
a, Tu cac chu so do , hay viet cac so tu nhien co ba chu so moi so co du ba chu so do . Xep cac o do theo thu tu tu be den lon .
b, Tu cac chu so do , hay viet cac so thap phan co ba chu so , moi so co du ba chu so va phan nguyen co mot chu so . Xep cac so do theo thu tu tu lon den be .
Sap xep cac phan so sau theo thu tu giam dan : 1/2 ; 2/3 ; 3/4 ; 4/5 ; 5/6 ; 6/7 ; 7/8 ; 8/9 ; 9/10
\(\frac{9}{10}>\frac{8}{9}>\frac{7}{8}>\frac{6}{7}>\frac{5}{6}>\frac{4}{5}>\frac{3}{4}>\frac{2}{3}>\frac{1}{2}.\)
sap xep cac phan so sau theo thu tu tu be den lon 4/25 6/35 3/17 2/15
Các phân số theo thứ tự từ bé đến lớn là :
2/15 ; 4/25 ; 6/35 ; 3/17
ta sẽ quy đồng tử số
\(\frac{4}{25}=\frac{12}{75}\)
\(\frac{6}{35}=\frac{12}{70}\)
\(\frac{3}{17}=\frac{12}{68}\)
\(\frac{2}{15}=\frac{12}{90}\)
Do 90 > 75 > 70 > 68
\(\Rightarrow\frac{2}{15}< \frac{4}{25}< \frac{6}{35}< \frac{3}{17}\)
ta sắp xếp dãy số theo thứ tự từ bé đến lớn
2/15 ; 4/25 ; 6/35 ; 3/17
2/15,3/17,4/25 và 6/35 nhé em
sap xep cac phan so sau theo thu tu giam dan:15/6;6/4;1;3/5;12/15;2004/1999
