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

Toán Lớp 5: A) 2 và 1/5- 1 và 2/3= B)1/7+3/7:2/5=

Toán Lớp 5: A) 2 và 1/5- 1 và 2/3=
B)1/7+3/7:2/5=

Comments ( 2 )

  1. a)2,1,5 – 1,2,3 =8/15
    b) 1/7 + 3/7 :  2/5 = 1/7 + 15/14 = 2/14 + 15/14 = 17/14
    Chúc bạn hok tốt!!!

  2. a,
    2 1/5-1 2/3
    =(2-1)+(1/5-2/3)
    =1-7/15
    =8/15
    b,
    1/7+3/7: 2/5
    =1/7+3/7. 5/2
    =1/7+15/14
    =2/14+15/14
    =17/14
    $_Ativity_$
     

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