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

Toán Lớp 4: 5/2-2/3; 20/5-18/5. Giúp em với ạ

Toán Lớp 4: 5/2-2/3; 20/5-18/5. Giúp em với ạ

Comments ( 2 )

  1. +)5/2 – 2/3
    =15/6 – 4/6
    =11/6
    +)20/5 – 18/5
    =(20-18)/5
    =2/5

  2. 5/2-2/3
    =15/6-4/6
    =(15-4)/6
    =11/6
    20/5-18/5
    =(20-18)/5
    =2/5
     

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