(1)2005*0.375-0.375*1949+3.75*2.4 (2)2006+200.6+20.06+2.006

题目

(1)2005*0.375-0.375*1949+3.75*2.4 (2)2006+200.6+20.06+2.006
(1)2005*0.375-0.375*1949+3.75*2.4
(2)2006+200.6+20.06+2.006
简便运算,求求你们了,我急用
我会赏分的

答案

1、2005*0.375-0.375*1949+3.75*2.4
=0.375×(2005－1949+24)
=0.375×80
=30
2、2006+200.6+20.06+2.006
=2.006×1000+2.006×100+2.006×10+2.006×1
=2.006×1111
=2228.666