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

Toán Lớp 6: Tìm : Ư ( 20 ) Ư ( 28) ƯC ( 12 , 20 )

Toán Lớp 6: Tìm : Ư ( 20 )
Ư ( 28)
ƯC ( 12 , 20 )

Comments ( 2 )

  1. Ư(20)={1;2;4;5;10;20}
    Ư(28)={1;2;4;714;28}
    12=2²×3
    20=2²×5
    ƯCLN(12,20)=2²=4
    ⇒ƯC(12,20)=Ư(4)={1;2;4}

  2. Ư(20) = { 1; 2; 4; 5; 10; 20}
    Ư(28) = { 1; 2; 4; 7; 14; 28}
    12 = 2^2. 3
    20 = 2^2. 5
    => ƯCLN ( 12; 20) = 2^2= 4
    => ƯC ( 12; 20) = { 1; 2; 4}
    #Chúc bạn học tốt
    #hncđ
    $\text{@HươngYang}$
     

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

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