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

Toán Lớp 6: Thực hiện phép tính 15+17+19+21+23+25=? 53.27+27.42+27.5

Toán Lớp 6: Thực hiện phép tính
15+17+19+21+23+25=?
53.27+27.42+27.5

Comments ( 2 )

  1. Lời giải:
    15+17+19+21+23+25
    =(15+25)+(17+23)+(19+21)
    =40+40+40
    =80+40
    =120
    $\\$
    53.27+27.42+27.5
    =27.(53+42+5)
    =27.(95+5)
    =27.100
    =2700

  2. 15+17+19+21+23+25
    =32 + 19 + 21 + 23 + 25
    = 51 + 21 + 23 + 25
    = 72 + 23 + 25
    =95 + 25 
    = 120
    53.27+27.42+27.5
    =27.(53 + 42 + 5 )
    =27 . 100
    = 2700 

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

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