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

Toán Lớp 5: Tính bằng cách thuận tiện nhất: 32,45 – 19,55 – 8,45

Toán Lớp 5: Tính bằng cách thuận tiện nhất: 32,45 – 19,55 – 8,45

Comments ( 2 )

  1. $32,45 – 19,55 – 8,45$
    $= 32,45 – (19,55 + 8,45)$
    $= 32,45 – 28$
    $= 4,45$

  2.    32,45 – 19,55 – 8,45
    = ( 32.45 – 8.45) – 19.55
    =      24              – 19.55
    =           4.45

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