问题 解答题
计算
(1)-
1
4
×(-2)3-[1-1÷(-2
1
2
)]÷
4
5

( 2)-12-[1
3
7
+(-12)÷6]2×(-
3
4
)3

(3){0.85-[12+4×(3-10)]}÷5            
(4)22+(-2)3×5-(-0.28)÷(-2)2
答案

(1)-

1
4
×(-2)3-[1-1÷(-2
1
2
)]÷
4
5

=-

1
4
×(-8)-[1+
2
5
4
5

=2-

6
5
÷
4
5

=2-1.5

=0.5;

( 2)-12-[1

3
7
+(-12)÷6]2×(-
3
4
)3

=-1-[1

3
7
-2]2×(-
27
64

=-1-[-

4
7
]2×(-
27
64

=-1-

16
49
×(-
27
64

=-1+

27
196

=-

169
196

(3){0.85-[12+4×(3-10)]}÷5

={0.85-[12+4×(-7)]}÷5

={0.85-[12-28]}÷5

={0.85+16}÷5

=16.85÷5

=3.37;

           

(4)22+(-2)3×5-(-0.28)÷(-2)2

=4+(-8)×5-(-0.28)÷4

=4-40+0.07

=-35.93.

单项选择题 A1型题
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