4.tính nhanh 18×(1111/3636+141414/727272-808/1818)

2 bình luận về “4.tính nhanh 18×(1111/3636+141414/727272-808/1818)”

1. 18xx(1111/3636+141414/727272-808/1818)

   =18xx(11/36+7/36-4/9)

   =18xx(18/36-4/9)

   =18xx(1/2-4/9)

   =18xx(9/18-8/18)

   =18xx1/18

   =1 

    

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2.      18×(1111/3636+141414/727272-808/1818)

   = 18×(11/36 + 14/72 -4/9)

   = 18×(11/36 + 7/36 – 16/36)

   = 18× 2/36

   = 18× 1/18

   = 1

   @ $2k10kaitokid$

    

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