42×(-23)÷72-(-12)÷(-4)．

题型：解答题难度：一般来源：不详

42×(-

2

3

)÷

7

2

-(-12)÷(-4)．

答案

42×(-

2

3

)÷

7

2

-(-12)÷(-4)
=42×（-

2

3

）×

2

7

-3
=-8-3
=-11．