题目内容

(每小题3分,共12分)
(1)                         (2) 8-8÷(-2)
(3)      (4)       
 (1)-8(2)11(3)-3.5(4)4
(1)                          (2) 8-8÷(-2)
=3-11                                   =8-(-4)-1  
=-8                                      =11 
(3)      (4)       
=-×+2×(-1.5)                      =-4×(-)+8÷4
=-3.5                                      =4
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