计算:(1)(-3)2-(-3)3-22+(-22)(2)3.25-[(-12)-(-52)+(-58)+423](3)(-4)÷(-3)×45÷(-5)(4)(-34)×38÷(-916)×(18).-数学
题文
计算: (1)(-3)2-(-3)3-22+(-22) (2)3.25-[(-
(3)(-4)÷(-3)×45÷(-5) (4)(-
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答案
(1)原式=9-(-27)-4+(-4) =9+27-4-4 =28; (2)原式=3
=3
=3
=3
=-2
(3)原式=(-4)×(-
=-4×
=-12; (4)原式=(-
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