2021×13+2007+2020×2007/2020 + 2020×520+1500×2020

0 bình luận về “2021×13+2007+2020×2007/2020 + 2020×520+1500×2020”

1. 2021×13+2007+2020×2007/2020 + 2020×520+1500×2020

   =2021×13 + 2007×1 + 2020 × 2007/2020×1 + 2020×520 + 1500×2020

   =2021×13 + 2007×(2020+1)/2020×(520+1+1500)

   =2021×13 + 2007×2021/2020×2021

   =2021×(2007+13)/2020×2021

   =2021×2020/2020×2021

   =1/1=1

    

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2. Giải thích các bước giải:

   2021×13+2007+2020×2007/2020 + 2020×520+1500×2020

   =2021×13+2007×1+2020×2007/2020×1+2020×520+1500×2020

   =2007x(1+2020)+2021×13/2020x(1+520+1500)

   =2007×2021+2021×13/2020×2021

   =2021x(2007+13)/2020×2021

   =2021×2020/2020×2021

   =1/1

   =1

   cho mik hay nhất nhé

    

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