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(1)241×690÷339÷345×678÷241(2)6﹣0.65+5×99(3)356×84﹣4×356﹣80÷(4)[3.75﹣(0.2+)×4]÷13.5%

题目详情
(1)241×690÷339÷345×678÷241 (2)6﹣0.65+5 ×99
(3)356×84 ﹣4 ×356﹣80÷ (4)[3.75﹣(0.2+ )×4 ]÷13.5%
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答案和解析
(1)241×690÷339÷345×678÷241
  =241×690× × ×678×
  =(241× )×( ×678)×(690×
  =1×2×2
  =4
(2)6﹣0.65+5 ×99
  =5.35+5.35×99
  =(1+99)×5.35
  =100×5.35
  =535
 
(3)356×84 ﹣4 ×356﹣80÷
  =356×84 ﹣4 ×356﹣80×356
  =356×(84 ﹣4 ﹣80)
  =356×0
  =0
 
(4)[3.75﹣(0.2+ )×4 ]÷13.5%
  =[3 ﹣( )×4 ]÷13.5%
  =[3 × ]÷13.5%
  =[ ]÷13.5%
  = ÷13.5%=10