Tính nhanh: a) ( 20 + 21 +22 + 23 + 24 +25 ) x ( 16 – 2 x 8 ) b) 1235 x 6789 x ( 630 – 315 x 2 ) : 1996 c) ( m : 1 m x 1 ) : m x ( 2008 + m +2008 ) v

0 bình luận về “Tính nhanh: a) ( 20 + 21 +22 + 23 + 24 +25 ) x ( 16 – 2 x 8 ) b) 1235 x 6789 x ( 630 – 315 x 2 ) : 1996 c) ( m : 1 m x 1 ) : m x ( 2008 + m +2008 ) v”

1. a) ( 20 + 21 +22 + 23 + 24 +25 ) x ( 16 – 2 x 8 )

   = ( 20 + 21 +22 + 23 + 24 +25 ) x ( 16 – 16 )

   = ( 20 + 21 +22 + 23 + 24 +25 ) x 0

   = 0

   b) 1235 x 6789 x ( 630 – 315 x 2 ) : 1996

   = 1235 x 6789 x ( 630 – 630 ) : 1996

   = 1235 x 6789 x 0 : 1996 = 0

   c) ( m : 1 – m x 1 ) : m x ( 2008 + m +2008 )

   = ( m – m ) : m x ( 2008 + m +2008 )

   = 0 : m x ( 2008 + m +2008 ) = 0

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2. a-( 20+21+22+23+24+25 )×( 16 – 2 × 8 )

   $=( 20 + 21 +22 + 23 + 24 +25 ) × 0$

   $=0$

   $b) 1235 × 6789 × ( 630 – 315 x 2 )÷1996$

   $=1235 ×6789 × 0 ÷1996$

   $=0$

   $c) ( m ÷1- m × 1 )÷m× ( 2008 + m +2008 )$

   =0÷m × ( 2008 + m +2008)

   $=0$

   $\text{Chúc bạn học tốt điểm A+}$

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