$\frac{2019×1999-2019×999}{2018×999+3018}$ cảm ơn ^^

0 bình luận về “$\frac{2019×1999-2019×999}{2018×999+3018}$ cảm ơn ^^”

1. Đáp án:

   $1$

   Giải thích các bước giải:

    $\dfrac{2019.1999-2019.999}{2018.999+3018}$

   $=\dfrac{2019.(1999-999)}{2018.999+2018.1+1000}$

   $=\dfrac{2019.1000}{2018.(999+1)+1000}$

   $=\dfrac{2019.1000}{2018.1000+1000}$

   $=\dfrac{2019.1000}{1000.(2018+1)}$

   $=\dfrac{2019.1000}{1000.2019}$

   $=1$

   Trả lời

2. ` \frac{ 2019.1999 – 2019 . 999}{2018.999 + 3018} = \frac{2019(1999 – 999)}{2018(999+1) + 1000} = \frac{2019 . 1000}{2018 . 1000 + 1000 } = \frac{ 2019.1000 }{1000(2018+1)} = \frac{2019.1000}{1000.2019}=1`

    

   Trả lời