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

Toán Lớp 7: a) x:15=8:24 b) 1,56:2,88=2,6:x

Toán Lớp 7: a) x:15=8:24
b) 1,56:2,88=2,6:x

Comments ( 2 )

  1. x:15=8:24
    => x:15=8/24
    => x:15=1/3
    => x = 5
    1,56:2,88=2,6:x
    => 1,56x = 2,88 . 2,6
    => 1,56x = 7,488
    => x = 4,8
    (Chúc bạn học tốt)
     

  2. giải thích các bước giải :
    a) x÷15=8÷24
    ↔️x/15=1/3
    ↔️x×3=15
    ↔️x=15÷3
    ↔️x=5
    b) 1,56÷2,88=2,6÷x
    ↔️13/24=13/5÷x
    ↔️13/5÷x=13/24
    ↔️x=13/5÷13/24
    ↔️x=24/5
     

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