Các câu hỏi tương tự
(2/5*7+2/7*9+2/9*11+........+2/19*21)-y:5/2=2/21 cac ban lam giup minh nhe chieu minh thi roi dung thi minh tick cho
1. 9/13-11/26+1/2
2.1/5+2/7+7/35
3.4/9+1/3:3/8
4.21/25-1/5*/2/3
cac ban giup minh nhe
cac ban giup minh voi
trong cac phan so sau , phan so nao lon hon 2/7
A.2/9
B.5/14
C.5/21
D.6/22
a.1/2+1/4+1/8+1/16+1/32
b.2/5+(2/8+3/5+6/8)
c.6/9+(24/15+12/9+6/15)
d.Bon,4/9-(hai,1/4+mot,4/9)
e.2006/2008*2001/2004*2008/2002*2004/2006*1001/2001
g.(1-1/2)*(1-1/3)*(1-1/4)*(1-1/5)*(1-1/6)
cac ban oi,hay giup minh giai bai nay nhe,cam on cac ban
16 : (3/5 x X + 8 / 21 +9 = 7/10
16/(3/5*x+8/21+9) bảng 7/10
16 : (3 /5 × x +8 +9/ 21 ) = 7/10
Bai 8: Mot to gom 15 nguoi, du dinh lam xong ngoi nha trong 20 ngay , nhung sau do to bo xung them 5 nguoi. Hoi ngoi nha do lam xong trong bao nhieu ngay?
cac ban oi
giup minh voi cac ban
ai lam duoc bai nay minh tich cho nhe
cam on cac ban rat nhieu
do cac ban giai duoc bai nay:
x/15=8/24
x-1/x+5=6/7
3/1-2x=-5/3x-2