Question

tính bằng cách thuận tiện nhất:

248x2005-2005x248

184x13+3x184-252x2

Answer 1

\(248.2005-2005.248=2005\left(248-248\right)=2005.0=0\)

\(184.13+3.184-252.2=184\left(13+3\right)-504=184.16-504=2944-504=2440\)

Answer 2

a. 248 x 2005 - 2005 x 248

= 2005 x ( 248 - 248)

= 2005 x 0 = 0

b. 184 x 13 + 3 x 184 - 252 x 2

= 184 x (13 + 3) - 252 x 2

= 184 x 16 - 252 x 2

= 2944 - 504 = 2440

Answer 3

\(248\)x\(2005-2005\)x\(248\)

= \(\left(248-248\right)\)x\(2005\)

= \(0\)x\(2005\)

=\(0\)

\(184\)x\(13+3\)x\(184-252\)x\(2\)

=\(184\)x\(\left(13+3\right)-252\)x\(2\)

=\(184\)x\(16\)\(-504\)

\(=2944-504\)

=\(2440\)

 

 

Answer 4

248 x 2005 - 2005 x 248

= 2005 x ( 248 - 248)

= 2005 x 0 = 0.

 184 x 13 + 3 x 184 - 252 x 2

= 184 x (13 + 3) - 252 x 2

= 184 x 16 - 252 x 2

= 2944 - 504 = 2440.

Answer 5

248x2005-2005x248

=(248-248)x2005

=0x2005

=0