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

Toán Lớp 6: (1+2+3+…+100) . ($1^{2}$ + $2^{2}$ + $3^{2}$ + –..+ $10^{2}$ ) . ( 65 . 111 – 13 . 15 . 37 )

Toán Lớp 6: (1+2+3+…+100) . ($1^{2}$ + $2^{2}$ + $3^{2}$ + ……….+ $10^{2}$ ) . ( 65 . 111 – 13 . 15 . 37 )

Comments ( 2 )

  1. (1+2+3+…+100).(1^2 +2^2 +3^2 +……+10^2 ).(65.111-13.15.37)
    =(1+2+3+…+100).(1^2 +2^2 +3^2 +……+10^2 ).(65.111-13.3.5.37)
    =(1+2+3+…+100).(1^2 +2^2 +3^2 +……+10^2 ).(65.111-3.37.5.13)
    =(1+2+3+…+100).(1^2 +2^2 +3^2 +……+10^2 ).(65.111-111.65)
    =(1+2+3+…+100).(1^2 +2^2 +3^2 +……+10^2 ).0
    =0
     *Số nào nhân với 0 thì cũng =0

  2. Giải đáp:
     0
    Lời giải và giải thích chi tiết:
    (1+2+3+….+100)(1^2+2^2+3^2+…+10^2)(65.111-13.15.37)
    = (1+2+3+….+100)(1^2+2^2+3^2+…+10^2)(65.111-13.5.3.37)
    = (1+2+3+….+100)(1^2+2^2+3^2+…+10^2)(65.111-65.111)
    = (1+2+3+….+100)(1^2+2^2+3^2+…+10^2)0
    =0

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