tính nhanh 9,04×45,5+9,04×25,5+4,52×2×28+9,04

2 bình luận về “tính nhanh 9,04×45,5+9,04×25,5+4,52×2×28+9,04”

1. Giải đáp:

   9,04xx45,5+9,04xx25,5+4,52xx2xx28+9,04

   =(9,04xx45,5+9,04xx25,5+9,04)+9,04xx28

   =9,04xx(45,5+25,5+1)+9,04xx28

   =9,04xx(71+1)+9,04xx28

   =9,04xx72+9,04xx28

   =9,04xx(72+28)

   =9,04xx100

   =904

    

   Trả lời
2. 9,04×45,5+9,04×25,5+4,52×2×28+9,04

   =9,04×45,5+9,04×25,5+9,04×28+9,04xx1

   =9,04xx(45,5+25,5+28+1)

   =9,04xx100

   =904

   color{skyblue}{Cow}

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