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

Toán Lớp 4: (2/5+3/10) +x =9/10. X-5/6=5/9-1/4. X x1/3 =2/5×1/2. X:1/2=2/9:2/3

Toán Lớp 4: (2/5+3/10) +x =9/10. X-5/6=5/9-1/4. X x1/3 =2/5×1/2. X:1/2=2/9:2/3

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
    a) ( 2/5 + 3/10 ) + x = 9/10
    = 7/10 + x = 9/10
                     x = 9/10 – 7/10
                      x = 1/5
    b) x – 5/6 = 5/9 – 1/4
        = x – 5/6 = 11/36
                      x = 11/36 + 5/6
                       x = 8/3
    c) x × 1/3 = 2/5 × 1/2
       = x × 1/3 = 1/5
                      x = 1/5 : 1/3
                       x = 3/5
    d) x : 1/2 = 2/9 : 2/3
         = x : 1/2 = 3/9
                     x = 3/9 × 1/2
                     x = 1/6

  2. gửi bạn
    CHÚC BẠN HỌC TỐT
     

    toan-lop-4-2-5-3-10-9-10-5-6-5-9-1-4-1-3-2-51-2-1-2-2-9-2-3

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

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