-18÷(-3)²+5×(-二分之一)³-(-15)÷5
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![-18÷(-3)²+5×(-二分之一)³-(-15)÷5](/uploads/image/z/603301-13-1.jpg?t=-18%C3%B7%28-3%29%26%23178%3B%2B5%C3%97%28-%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80%29%26%23179%3B-%28-15%29%C3%B75)
-18÷(-3)²+5×(-二分之一)³-(-15)÷5
-18÷(-3)²+5×(-二分之一)³-(-15)÷5
-18÷(-3)²+5×(-二分之一)³-(-15)÷5
原式=-18÷9+5x(-1/8)-(-3)
=-2+(-5/8)+3
=-2+3+(-5/8)
=1-5/8(括号前面是减号,去掉括号要变号)
=3/8
-18÷(-3)²+5×(-二分之一)³-(-15)÷5
=-18÷9-5×1/8+3
=-2-5/8+3
=3/8
-18÷9+5×1/8--3
=-2+5/8+3
=13/8.