题目内容
计算(1)-23+(+58)-(-5)
(2)
×(-36)
(3)-22×(-
)+8÷(-2)2
(4)(-1)2009-(1-0.5)×
×[2-(-3)2]
(2)
(3)-22×(-
(4)(-1)2009-(1-0.5)×
解:(1)![]()
=![]()
=40
(2)![]()
法(一)
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=![]()
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法(二)
=
=
=![]()
(3)![]()
=![]()
=![]()
=4
(4)![]()
=![]()
=![]()
=![]()
=![]()
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