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

Toán Lớp 6: 1/9 – 1/39 + 1/63 : 1/12 – 1/52 + 1/84 Giúp em với ạ

Toán Lớp 6: 1/9 – 1/39 + 1/63 : 1/12 – 1/52 + 1/84
Giúp em với ạ

Comments ( 2 )

  1. 1/9−1/39+1/63:1/12−1/52+1/84
    =1/9−1/39+4/21−1/52+1/84
    =364/3276−84/3276+624/3276−63/3267+39/3276
    =(364−84+624−63+39)/3276
    =880/3276
    =220/819
    color{red}{Rusian} 

  2. 1/9 – 1/39 + 1/63 : 1/12 – 1/52 + 1/84
    = 1/9 – 1/39 + 4/21 – 1/52 + 1/84
    =364/3276- 84/3276 + 624/3276 – 63/3267+ 39/3276
    = \frac{364- 84 + 624 – 63 + 39}{3276}
    = 880/3276
    =220/819

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