\(\frac{6}{7}+\frac{5}{8}=\frac{83}{56}\)
\(\frac{3}{5}-\frac{3}{8}=\frac{9}{40}\)
\(\frac{1}{4}+\frac{5}{6}=\frac{13}{12}\)
\(\frac{4}{9}-\frac{1}{6}=\frac{15}{54}\)
1x2 + 2×3 +3×4 +4×5 +5×6+6×7+7×8+8×9+9×10
Ai tra loi nhanh va dung mk tk cho 2 cai
nho la tinh nhanh nha cac ban
Tinh bang cach thuan tien:
6/5+7/6+8/7+....+2008/2007
Cac ban chi cho minh ca ket qua va cach lam nhe.
Xin cam on tat ca cac ban.Minh dang can gap.
1 a, 3 va 1/5 - 2 va 1/6 + 1/5
b, 5 va 12/13 - 2 va 15/26 + 1/26
c, 7 va 1/12 + 1/12 - 6 va 1/4
2 tinh gia tri bieu thuc
a, 3 va 2/9 - [1 va 5/8 + 1 va 2/9 ] - 3/8
b, 4 va 2/5 - 1 va 3/7 - 1 va 4/7 + 1/5
c, 1 va 9/12 - 5/4 - 1/2
3 tinh
a, 6 nhan 7 nhan 8 nhan 9 nhan 1 tren 18 nhan 16 nhan 14 nhan 12 nhan 2
b, 4 nhan 15 nhan 9 nhan 24 tren 3 nhan 12 nhan 8 nhan 5
4 rut gon cac phan so
a, 96/150 ; 255/408 ; 630/224
b, 1515/1717; 352352/470470; 200620062006/200520052005
5 so sanh cac phan so
a, 7/9 va 9/7 ; b, 135/120 va 13/8; c, 3535/4848 va 5/8 ; d, 650650/480480 va 222222/144144
6, so sanh hai phan so
a, 2005/2006 va 2006/2007 ; b, 2008/2007 va 2007/2006
cac ban lam tung buoc nha
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
Sap xep cac phan so sau theo thu tu tu lon den be
8/9; 4/5; 9/8; 3/4; 10/9; 12/12; 7/8; 1/6; 1/4; 3/2; 1/5; 8/7; 6/5; 5/6; 4/3; 6/7; 2/3; 2/15; 1/2;5/4
6/5+7/6+8/7+......+2008/2007
Day la bai tinh bang cach thuan tien nhat nhe.
Cach ban chi cho minh cach lam va ket qua nhe.
Cam on cac ban nhieu.
1+1+1+1+2+2+2+3+3+3+3+4+4+4+4+5+5+5+5+6+6+6+6+7+7+7+7+8+8+8+8+9+9+9+9+10=
Tinh Nhanh:
6 2/7 + 7 3/5 + 8 6/9 + 9 1/4 +2/5 + 5/7 + 1/3 + 3/4 + 1967
Tính nhanh:
1+3+5+7+9+2+4+6+8+10+1+3+5+7+9+...+99+2+4+6+8+...+100+1+3+5+7+9+...+999+2+4+6+8+...+1000
(Ai trả lời đầy đủ, đúng và sớm nhất sẽ được like)
