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

Toán Lớp 6: Bài toán 3 : Tính. a) (-354) – (+75) b) (-445) – (-548) c) -72 – (+455) d) –(-1945) – (-67)

Toán Lớp 6: Bài toán 3 : Tính.
a) (-354) – (+75)
b) (-445) – (-548)
c) -72 – (+455)
d) –(-1945) – (-67)

Comments ( 2 )

  1. a) (-354) – (+75)
    = -429
    b) (-445) – (-548)
    = 103
    c) -72 – (+455)
    = -527
    d) –(-1945) – (-67)
     = 2012

  2. Giải đáp:
    $a) (-354)-(+75)$
    $= (-354)-75$
    $= -(354+75)$
    $=- 429$
    $b) (-445)-(-648)$
    $= (-445)+648$
    $= 648-445$
    $= 203$
    $c) (-72)-(+455)$
    $= (-72)-455$
    $= -(72+455)$
    $= -527$
    $d) -(-1945)-(-67)$
    $= 1945+67$
    $= 2012$
     

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