问题 解答题
计算(1)3
5
6
-1
3
4
+5
1
6
+3
3
4

(2)(-3)2+(-2)3×(-
1
4
)÷(-
1
2
);
(3)(-1)5×[4
2
3
÷(-4)+(-
1
4
)×(-0.4)]÷(-
1
3
);
(4)-14-(1-0.5)×
1
3
×[2-(-3)2];
(5)(-
2
3
+
5
6
)×24-3.95×6-1.45×6;
(6)26-(-5)×(-7).
答案

(1)3

5
6
-1
3
4
+5
1
6
+3
3
4
=3
5
6
+5
1
6
-1
3
4
+3
3
4
=9+2=11;

(2)(-3)2+(-2)3×(-

1
4
)÷(-
1
2
)=9+(-8)×(-
1
4
)×(-2)=9-4=5;

(3)(-1)5×[4

2
3
÷(-4)+(-
1
4
)×(-0.4)]÷(-
1
3
)=-1×(-
14
3
×
1
4
+
1
4
×
4
10
)×(-3)=-(-
1
15
)×(-3)=-
1
5

(4)-14-(1-0.5)×

1
3
×[2-(-3)2]=-1-
1
2
×
1
3
×(-7)
=-1+
7
6
=
1
6

(5)(-

2
3
+
5
6
)×24-3.95×6-1.45×6=-16+20-6×(3.95+1.45)=4-6×5.4=4-32.4=-28.4;

(6)26-(-5)×(-7)=26-35=-9.

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