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 2
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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 2](/uploads/image/z/3173599-55-9.jpg?t=%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97+19.3%C3%B750%C3%B72+360%C3%B7%EF%BC%883%2B1.8%EF%BC%89+3.4%C3%9712.5%2B6.6%C3%9712.5+2.6%C3%B70.25%C3%B70.13+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.
=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.
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 2
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