试题:
计算:
(1)1-
4
7
+
1
5
-
3
7
+
9
5

(2)-3÷(-5)×
1
5

(3)-24×(-
1
2
+
3
4
-
1
3
)

(4)-14÷(-5)2×(-
5
3
)+|0.8-1|

答案:

我来补答
(1)原式=1+(-
4
7
-
3
7
)+(
1
5
+
9
5
)=1-1+2=2;
(2)原式=-3×(-
1
5
)×
1
5
=
3
25

(3)原式=24×
1
2
-24×
3
4
+24×
1
3
=12-16+8=4;
(4)原式=-1×
1
25
×(-
5
3
)+
1
5
=
1
15
+
1
5
=
4
15
 
 
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