Toán Lớp 9: c, `(1946 . 131 + 1000)/(132 . 1946 -946`

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1. $\dfrac{1946.131+1000}{132.1946-946}$

   $=\dfrac{1946.(132-1)+1000}{132.1946-946}$

   $=\dfrac{132.1946-1946+1000}{132.1946-946}$

   $=\dfrac{132.1946-(1946-1000)}{132.1946-946}$

   $=\dfrac{132.1946-946}{132.1946-946}$

   $=1$

2. đây nhé no copy nha

   = 1946,131 + 1000/1946,131 + 1946 – 946

   = 1946,131 + 1000/1946,131 + 1000

   = 1