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

Toán Lớp 6: d) (1+3+5+7+⋯+49)(15.18.24−15.6.72)

Toán Lớp 6: d) (1+3+5+7+⋯+49)(15.18.24−15.6.72)

Comments ( 2 )

  1. Answer
    (1 + 3 + 5 + … + 49) . (15 . 18 . 24 – 15 . 6 . 72)
    = (1 + 3 + 5 + … + 49) . (270 . 24 – 90 . 72)
    = (1 + 3 + 5 + … + 49) . (10800 – 10800)
    = (1 + 3 + 5 + … + 49) . 0
    = 0
     

  2. (1+3+5+. . .+49)(15.18.24-15.6.72)
    =(1+3+5+. . .+49)(15.6.3.24-15.6.72)
    =(1+3+5+. . .+49)(15.6.72-15.6.72)
    =(1+3+5+. . .+49).0
    =0

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

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