| 脱式计算。(能简算的要简算) | ||||||
|
||||||
(1)1375+450÷18×25
=1375+625
=2000 (2)
=(1
+1
)×
=
(3)20042004×20042003-20042005×20042002
=20042004×20042003-(20042004+1)×20042002
=20042004×20042003-20042004×20042002-20042002
=20042004-20042002
=2 (4)
=
=
=
(5)
=
=613.5
关注公众号回复:奥数答案
即可免费获得密码查看答案
