Calculate the following questions:

( 1) 125×(40+8); (2)( 100-4)×25;

(3)2004×25; (4) 125×792。

Solution:

( 1) 125×(40+8)

= 125×40+ 125×8

=5000+ 1000

=6000;

(2)( 1) 125×(40+8)

= 125×40+ 125×8

=5000+ 1000

=6000;

(3)2004×25

=(2000+4)×25

=2000×25+4×25

=50000+ 100

=50 100;

(4) 125×792

= 125×(800-8)

= 125×800- 125×8

=( 125×8)× 100- 1000

= 1000× 100- 1000

= 1000×( 100- 1)

=99000。