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

Toán Lớp 6: Bài 1: Tìm ƯCLN của: a, 60;90 b, 24;49;96 c, 126;210 d, 48;72;90

Toán Lớp 6: Bài 1: Tìm ƯCLN của:
a, 60;90
b, 24;49;96
c, 126;210
d, 48;72;90

Comments ( 2 )

  1. Lời giải và giải thích chi tiết:
    a)
    60 = 2^2 . 3 . 5
    90 = 2 . 3^2 . 5
    ⇒ ƯCLN_((60 ; 90)) = 2 . 3 . 5 = 30
    b)
    24 = 2^3 . 3
    49 = 7^2
    96 = 2^5 . 3
    ⇒ ƯCLN_((24 ; 49 ; 96)) = 1
    c)
    126 = 2 . 3^2 . 7
    210 = 2 . 3 . 5 . 7
    ⇒ ƯCLN_((126 ; 210)) = 2 . 3 . 7 = 42
    d)
    48 = 2^4 . 3
    72 = 2^3 . 3^2
    90 = 2 . 3^2 . 5
    ⇒ ƯCLN_((48 ; 72 ; 90)) = 2 . 3 = 6

  2. a)
    60=2^2. 3. 5
    90=2. 3^2. 5
    ->ƯCLN(60;90)=2. 3. 5=30
    b)
    24=2^3. 3
    49=7^2
    96=2^5. 3
    ->ƯCLN(24;49;96)=1
    c)
    126=2.3^2. 7
    210=2. 3. 5. 7
    ->ƯCLN(126;210)=2. 3. 5=42
    d)
    48=2^4. 3
    72=2^3. 3^2
    90=2. 3^2. 5
    ->ƯCLN(48;72;90)=2.3=6
    #tcv

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

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