简便计算 19.3÷50÷2 360÷(3+1.8) 3.4×12.5+6.6×12.5 2.6÷0.25÷0.13 25×7.8×0.4×0.2

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/07 15:27:18
简便计算19.3÷50÷2360÷(3+1.8)3.4×12.5+6.6×12.52.6÷0.25÷0.1325×7.8×0.4×0.2简便计算19.3÷50÷2360÷(3+1.8)3.4×12.5

简便计算 19.3÷50÷2 360÷(3+1.8) 3.4×12.5+6.6×12.5 2.6÷0.25÷0.13 25×7.8×0.4×0.2
简便计算 19.3÷50÷2 360÷(3+1.8) 3.4×12.5+6.6×12.5 2.6÷0.25÷0.13 25×7.8×0.4×0.2

简便计算 19.3÷50÷2 360÷(3+1.8) 3.4×12.5+6.6×12.5 2.6÷0.25÷0.13 25×7.8×0.4×0.2
19.3÷50÷2
  =19.3÷(50×2)
  =19.3÷100
  =0.193.
  360÷(3+1.8)
  = 360÷3+ 360÷1.8
  = 120+ (360×10)÷(1.8×10)
  =120+3600÷18
  =120+200
  =320.
  3.4×12.5+6.6×12.5
  =(3.4+6.6)×12.5
  =10×12.5
  =125.
  2.6÷0.25÷0.13
  =2.6÷0.13÷0.25
  =[(2.6×100)÷(0.13×100)]÷(1/4)
  =(260÷13)×4
  =20×4
  =80.
  25×7.8×0.4×0.2
  =(25×0.4)×0.2×7.8
  =10×0.2×7.8
  =2×7.8
  =15.6.