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

Toán Lớp 5: 5/2.5+5/5.8+5/8.11+-+5/62+65+5/65+68

Toán Lớp 5: 5/2.5+5/5.8+5/8.11+….+5/62+65+5/65+68

Comments ( 2 )

  1. @Namelesszz206
    Nhớ vote mình 5 sao, cảm ơn và ctlhn.
    Chúc bạn học tốt.

    toan-lop-5-5-2-5-5-5-8-5-8-11-5-62-65-5-65-68

  2. Giải đáp+Lời giải và giải thích chi tiết:
     5/2.5+5/5.8+5/8.11+….+5/62.65+5/65.68
    =5/3(3/2.5+3/5.8+3/8.11+….+3/62.65+3/65.68)
    =5/3(1/2-1/5+1/5-1/8+…….+1/62-1/65+1/65-1/68)
    =5/3x(1/2-1/68)
    =5/3×33/68
    =55/68

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