题目内容
(每小题3分,共12分)
(1)
(2) 8-8÷(-2)
(3)
(4)
(1)
(3)
(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
=3-11 =8-(-4)-1
=-8 =11
(3)
=-
=-3.5 =4
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