计算:(1)(-8)+(-15)(2)12+(?23)(3)(-0.6)+1.7+(+0.6 )+(-1.7 )+(-9 )(4)|?212|?(?2
计算:(1)(-8)+(-15)(2)12+(?23)(3)(-0.6)+1.7+(+0.6)+(-1.7)+(-9)(4)|?212|?(?2.5)+1?|1?212|...
计算:(1)(-8)+(-15)(2)12+(?23)(3)(-0.6)+1.7+(+0.6 )+(-1.7 )+(-9 )(4)|?212|?(?2.5)+1?|1?212|(5)(+1325)?(+5516)+(+735)+(?1456)?(?11.702).
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