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

Toán Lớp 6: ƯCLN (24, 72, 180) ƯCLN (36, 48, 90)

Toán Lớp 6: ƯCLN (24, 72, 180)
ƯCLN (36, 48, 90)

Comments ( 2 )

  1. $\text{24 = 8. 3 = 2³. 3}$
    $\text{72 = 3. 24 = 3². 8 = 3². 2³}$
    $\text{180 = 30. 6 = 10. 3. 3. 2 = 2². 3². 5}$
    $\text{ƯCLN( 24; 72; 180 ) = 2². 3 = 12}$
    $\text{36 = 4. 9 = 2². 3²}$
    $\text{48 = 8. 6 = 2³. 3. 2 = $2^{4}$ . 3}$
    $\text{90 = 9. 10 = 3². 2. 5}$
    $\text{ƯCLN( 36; 48; 90 ) = 2. 3 = 6}$

  2. Ta có:
    24=2^3 . 3
    72=2^3 . 3^2
    180=2^2 . 3^2 . 5
    => ƯCLN (24; 72; 180) = 2^2 . 3=12
    Vậy ƯCLN (24; 72; 180) =12
    ——————————
    Ta có:
    36=2^2 . 3^2
    48=2^4 . 3
    90=2.3^2 . 5
    => ƯCLN (36; 48; 90)=2.3=6
    Vậy ƯCLN (36; 48; 90) = 6

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