问题 解答题
计算:
(1)(-30)-(-28)+(-70)-88      
(2)-[3.5-(-1.13)-(-0.33)]+2.5
(3)(-11
1
4
)×(-1
1
3
)×(-0.3)×3
1
3
×(-
3
5

(4)1-
1
25
×[2-(-3)]2

(5)(1-1
1
2
-
3
8
+
7
12
)×(-24)
(6)-23÷
4
9
×(-
2
3
)2+(-0.8)-5×(-
1
22
)
答案

(1)原式=-30+28-70-88

=-100-60

=-160;

(2)原式=-[3.5+1.13+0.33]+2.5

=-4.96+2.5

=-2.46;

(3)原式=

45
4
×
4
3
×
3
10
×
10
3
×
3
5

=9;

(4)原式=1-

1
25
×(2+3)2

=1-

1
25
×25

=1-1

=0;

(5)原式=1×(-24)-

3
2
×(-24)-
3
8
×(-24)+
7
12
×(-24)

=-24+36+9-14

=7;

(6)原式=-8×

9
4
×
4
9
-
4
5
-5×(-
1
4

=-8-

4
5
+
5
4

=-7

11
20

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