[0.9×19+(4.8-3.8)÷10/19]÷(2+9/10-1.9) 分数加减乘除法
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[0.9×19+(4.8-3.8)÷10/19]÷(2+9/10-1.9) 分数加减乘除法
![[0.9×19+(4.8-3.8)÷10/19]÷(2+9/10-1.9) 分数加减乘除法](/uploads/image/z/15535056-48-6.jpg?t=%5B0.9%C3%9719%EF%BC%8B%EF%BC%884.8-3.8%EF%BC%89%C3%B710%2F19%5D%C3%B7%EF%BC%882%2B9%2F10%EF%BC%8D1.9%EF%BC%89+%E5%88%86%E6%95%B0%E5%8A%A0%E5%87%8F%E4%B9%98%E9%99%A4%E6%B3%95)
[0.9×19+(4.8-3.8)÷10/19]÷(2+9/10-1.9)
=(0.9×19+1×19/10)÷(2.9-1.9)
=(9×1.9+1.9)÷1
=(9+1)×1.9
=10×1.9
=19
=(0.9×19+1×19/10)÷(2.9-1.9)
=(9×1.9+1.9)÷1
=(9+1)×1.9
=10×1.9
=19