\(\left(1+3+5+7+...+65+67\right)\cdot\left(125\cdot1001-125125\right)+10\)
\(=\left(1+3+5+...+65+67\right)\cdot\left(125\cdot1000+125-125125\right)+10\)
\(=\left(1+3+5+...+65+67\right)\cdot\left(125000+125-125125\right)+10\)
\(=\left(1+3+5+...+65+67\right)\cdot\left(125125-125125\right)+10\)
\(=\left(1+3+5+...+65+67\right)\cdot0+10\)
\(=0+10\)
\(=10\)
Hơi dài dòng nhưng đầy đủ
( 1 + 3 + 5 + 7+...+2003 + 2005 ) x ( 125125 x 127 - 127127 x 125 ) = ?
Tính nhanh
a) (45-63+18) x (1+2+3+4+5+6+7+8+9)
b) 60-61+62-63+64-65+66-67+68-69+70
(1+3+5+7...+2011)*(125125+127-127127*125)
tính nhanh
( 1+3+5+7+...+2003+2005 ) x ( 125125 x 127 - 127127 x 125 )
giúp mik vs
tính=cách hợp lí:
(1+3+5+7+...+2011+2013)×(125125×127-127127)
(1 + 3 + 5 + .... +2007 + 2009 + 2011 ) x (125125 x 127 - 127127 x 125 )
4/7 + 2/3
5/6 - 3/4
3/10 x 15/6
7/6 : 5/4
Tính :
a) ( 1 + 3 + 5 + 7 + ....... + 2007 + 2009 + 2011 ) x ( 125125 x 127 - 127127 x 125 )
b) \(\frac{1}{3}+\frac{1}{15}+\frac{1}{35}+\frac{1}{63}+\frac{1}{99}+\frac{1}{143}+\frac{1}{195}\)
1.Tính nhanh
a.(1 + 3 + 5 + 7 + ......+ 2011 ) x ( 125125 x 127 - 127127 x 125 )
b.2006x125+1000/126x2006-1006
c.1995/1997 x 1990/1993 x 1997/1994 x 1993/1995 x 997/995
ai lafm đúng thì mình sẽ tick nha
