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

Toán Lớp 6: 53.39+47.39-53.21-47.21 Giúp e vs

Toán Lớp 6: 53.39+47.39-53.21-47.21
Giúp e vs

Comments ( 2 )

  1. ~ Bạn tham khảo ~
    53 .39 + 47 .39 – 53 . 21 – 47 . 21
    = 39 . ( 53 + 47 ) – ( 53 . 21 + 47 . 21 )
    = 39 . 100 – [ 21 . ( 53 + 47 )]
    = 39 . 100 – 21 . 100
    = 100 . ( 39 – 21 )
    = 100 . 18
    = 1800
     

  2. Giải đáp  + Lời giải và giải thích chi tiết:
    53.39+47.39-53.21-47.21
    = (53 . 39 + 47 . 39) – (53 . 21 – 47 . 21)
    = 39 ( 53 + 47) – 21 . (53 + 47)
    = 39 . 100 – 21 . 100
    = 3900 – 2100
    = 1800

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

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