=23×24×101-24×23×101
=0;
②52,44×79,45+159 ×47,56+79,55×52,44
=52,44×(79,45+79,55)+159×47,56
=52,44×159+159×47,56
=159× (52,44+47,56)
=159×100
=15900;
③ 18× 3 7 +0,65× 8 13 - 2 7 ×18+ 5 13 ÷1 7 13
= 54 7 + 2 5 - 32 7 + 1 4
=( 54 7 - 32 7 )+( 2 5 + 1 4 )
=3 1 7 + 13 20
=3 111 140;
④ 2,75+ 5 12 -1,4+2 1 4 ÷ 5 12 -87,5%
=2,75+ 5 12 -1,4+5,4-87,5%
=3 1 6 -1,4+5,4-87,5%
=3 1 6 +4-87,5%
=6 7 24;
⑤ 2010×2008+1 2009 + 2009+2010×2008 2009×2010-1
= 2009×2008+2008 +1 2009 + 2009+2008×2009+2008 2009×(2009+1)-1
= 2009×(2008+1) 2009 + 2009×(2008+1)+2008 2009×2009+ 2008
=2009+1
=2010.