题目内容

脱式计算,能简算的要简算。
(1)1723-1152÷32 (2)21.38-(1.38+0.46)
(3)38×+62× (4)×[-(-)]
(5)0.5÷[(-)×3] (6)解方程:x+x=
(1)1723-1152÷32
  =1723-36
  =1687
  
(2)21.38-(1.38+0.46)
  =21.38-1.38-0.46
  =20-0.46
  =19.54
(3)38×+62×
  =×(38+62)
  =×100
  =6
 
(4)×[-(-)]
  =×[(+)-]
  =×(1-
  =×
  =
(5)0.5÷[(-)×3]
  =0.5÷(×3)
  =0.5÷
  =1
(6)解方程:x+x=
   解:(+)x= 
                          x=  
                                  x=
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