问题 解答题
计算
(1)4.25×0.75+75%×4.75+
3
4
    
(2)1÷
1
3
-
1
3
÷1
(3)2006×97-96×2007.
答案

解(1):4.25×0.75+75%×4.75+

3
4

=0.75×(4.25+4.75+1),

=0.75×10,

=7.5;

(2)1÷

1
3
-
1
3
÷1,

=3-

1
3

=2

2
3

(3)2006×97-96×2007,

=(2007-1)×97-96×2007,

=2007×97-97-96×2007,

=2007×(97-96)-97,

=2007-97,

=1910.

单项选择题
单项选择题