\(\frac{9}{14}-\frac{2}{7}=\frac{9}{14}-\frac{4}{14}=\frac{5}{14}\)
\(\frac{9}{14}\)-\(\frac{2}{7}\)=\(\frac{9-4}{14}\)=\(\frac{5}{14}\)
14/15 - 5/6
9/7- 9/14
2 - 3/4
y + 14/9 - y × 7/9 + y × 5/9 = 2
Bài 2. > , < , = ?
5/7… 4/3 2/5 …… 6/10 1/4 …… 3/12 27/36 ….. 2/9 7/6 …… 7/9
7/2 …… 2/7 15/23........1 27/9.......2 14/15........1 51/17........4
a) ( ( -3/5 + 4/9 ) : 2/7 - (-14/9 + 2/5 ) :2/7 ) : (23/7 x 15/2 - 23/7 x 11/2)
b) ( 8 - 9/4 + 2/7) - (-6 x -3/7 + 5/4 ) - ( 3 + 2/4 - 9/7 )
Mình cảm ơn ! :v
5/7*12/11+9/7*2/11-5/7*14/11
12/15 - 7/10 = ; 9/14 - 2/7 ; 2 - 3/4 ; 5 - 1,5 - 1 và 1/2
Tính nhanh:
a.3/5 *7/9 +11/9 *3/5 -3/10 =
b,14/13:1/2 +3/13 *2 -2*7/13=
tính nhanh : 3/5 x 7/9 + 11/9 x 3/5 - 3/10
14/13 : 1/2 + 3/13 x 2 - 2 x 7/13
9/14 - 2/7 =
5-1,5-1và1/2
