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

Toán Lớp 7: 1$\frac{6}{13}$ + $\frac{5}{18}$ – $\frac{6}{13}$ + 0,5 + $\frac{13}{18}$

Toán Lớp 7: 1$\frac{6}{13}$ + $\frac{5}{18}$ – $\frac{6}{13}$ + 0,5 + $\frac{13}{18}$

Comments ( 2 )

  1. 1 6/13 + 5/18 – 6/13 + 0,5 + 13/18
    =19/13 + 5/18 – 6/13 + 0,5 + 13/18
    =(19/13 – 6/13 ) + ( 5/18+13/18) + 0,5
    =1+1+0,5
    =2,5
     

  2. 1 6/13 + 5/18 – 6/13 + 0,5 + 13/18
    = (1 6/13 – 6/13) + (5/18 + 13/18) + 1/2
    = 1 + 18/18 + 1/2
    = 1 + 1 + 1/2
    = 2 + 1/2
    = 5/2.

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