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

Toán Lớp 5: kết quả của dãy tính ( 1+3+5+7+…+99)x ( 33×70-21×110)

Toán Lớp 5: kết quả của dãy tính ( 1+3+5+7+…+99)x ( 33×70-21×110)

Comments ( 2 )

  1. $\text{( 1 + 3 + 5 + 7 + … + 99 )}$ $\times$ $\text{( 33}$ $\times$ 77 – 21 $\times$ 110
    = $\text{( 1 + 3 + 5 + 7 + … + 99 )}$ $\times$ ( 2310 – 2310 )
    = $\text{( 1 + 3 + 5 + 7 + … + 99 )}$ $\times$ 0
    = 0
     

  2. ( 1 + 3 + 5 + 7 + … + 99 ) × ( 33 × 70 – 21 × 110 )
    = ( 1 + 3 + 5 + 7 + … + 99 ) × ( 2310 – 2310 )
    = ( 1 + 3 + 5 + 7 + … + 99 ) × 0
    = 0
    #dtkc
     

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