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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 5: `1 1/2 xx 2 1/2 = 4 3/4` Sai or Đúng

Toán Lớp 5: 1 1/2 xx 2 1/2 = 4 3/4
Sai or Đúng

Comments ( 2 )

  1. sai
    1$\frac{1}{2}$×2$\frac{1}{2}$
    =$\frac{3}{2}$×$\frac{5}{2}$
    =$\frac{15}{4}$ 
    4$\frac{3}{4}$= $\frac{19}{4}$
    mà 15<19
    => 1$\frac{1}{2}$×2$\frac{1}{2}$ < $\frac{19}{4}$

  2. Giải đáp : Sai   
    1 1/2 xx 2 1/2
    =3/2 xx 5/2
    =15/4
    =3 3 /4

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222-9+11+12:2*14+14 = ? ( )

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