题目内容

计算:
①8+(-10)+(-2)-(-5)
②(-5)÷(-
5
4

③-36÷(-6)-72÷(-8)
④8×(-
4
5
)÷|-16|
⑤(-24)×(-
1
2
+
3
4
-
1
3
)    
⑥(-
1
2
)+(-
3
4
)-(-1
3
4
)+(+1.5)
⑦18×(-
2
3
)+13×
2
3
-4×
2
3
           
⑧-32-[1-(-2)3]÷(-3)
①8+(-10)+(-2)-(-5)
=8-10-2+5
=1;

②(-5)÷(-
5
4
)=4;

③-36÷(-6)-72÷(-8)
=6+9
=15;

④8×(-
4
5
)÷|-16|
=8×(-
4
5
)÷16
=-10÷16
=-
5
8


⑤(-24)×(-
1
2
+
3
4
-
1
3

=12-18+8
=2;
    
⑥(-
1
2
)+(-
3
4
)-(-1
3
4
)+(+1.5)
=(-
1
2
+1.5)+(-
3
4
+1
3
4

=1+1
=2;

⑦18×(-
2
3
)+13×
2
3
-4×
2
3
  
=(-18+13-4)×
2
3

=-9×
2
3

=-6;   
  
⑧-32-[1-(-2)3]÷(-3)
=-9-[1+8]÷(-3)
=-9-9÷(-3)
=-9+3
=-6.
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