题目内容
计算:[(1)---(3)题用分数表示,(4)题用小数表示。]
(1)![]()
(2)![]()
(3)![]()
(4)![]()
答案:1/2;-4/5;4/3;1.68
解析:
解析:
|
(1) = = = (2) = = = = (3) = = = (4) =( -2.4)×(-3.5)÷[4+1]=8.4 ÷5=1.68 |
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