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简算. (1)46÷5÷0.8 (2)2.5×3.2+2.5×0.8 (3)9.87×6.2÷0.987 (4)82.5×0.125×8

编辑:chaxungu时间:2026-04-27 13:19:20分类:小学数学题库

简算。
(1)46÷5÷0.8(2)2.5×3.2+2.5×0.8
(3)9.87×6.2÷0.987(4)82.5×0.125×8
(1)46÷5÷0.8
  =46÷(5×0.8)
  =46÷4
  =11.5  
(2)2.5×3.2+2.5×0.8
  =2.5×(3.2+0.8)
  =2.5×4
  =10 
(3)9.87×6.2÷0.987
  =9.87÷0.987×6.2
  =10×6.2
  =62 
(4)82.5×0.125×8
  =82.5×(0.125×8)
  =82.5×1
  =82.5