tính nhanh : a =\(\frac{2006x125-1000}{126x2006-1000}\)
Tính nhanh
36,4 x 99 + 36 + 0,4 \(4\frac{1}{3}\chi\frac{3}{5}+4\frac{1}{3}:2\frac{1}{2}+1\frac{1}{3}\)
\(\frac{36,4x125+1000}{126x2006-1006}\)
tính nhanh :\(\frac{2006.125+1000}{2006.126-1006}\)
Tính B = 998 - 1000 + 1002 - 1004 + 1006 - 1008 + ...+ 2010 - 2012
-996+998-1000+1002-1004+1006-.........-2012+2014
bài 44:
a,24:{390[500-(125+35.7)]}-32
b,-996+998-1000+1002-1004+1006-...-2012+2014
Chứng tỏ : \(\frac{1005}{1006}+\frac{1006}{1007}+\frac{1007}{1008}+\frac{1008}{1005}\) >4
\(\frac{1005}{1006}+\frac{1006}{1007}+\frac{1007}{1008}+\frac{1008}{1005}>4\)
-996+998-1000+1002-1004+1006-...-2012+2014
Giúp mk nha👉👉👉😉😉😉
