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

Toán Lớp 6: Tính hợp lí: ( 52 – 16 – 34 ) – ( 52 – 34 ) -2003 + ( -21 + 75 + 2003 ) + 21

Toán Lớp 6: Tính hợp lí:
( 52 – 16 – 34 ) – ( 52 – 34 )
-2003 + ( -21 + 75 + 2003 ) + 21

Comments ( 2 )

  1. Lời giải và giải thích chi tiết:
     (52-16-34)-(52-34
    =52-16-34-52+34
    =(52-52)+(-34+34)-16
    =0+0-16
    =-16
    ——————————————————-
    -2003+(-21+75+2003)+21
    =-2003+(-21)+75+2003+21
    =(-2003+2003)+(-21+21)+75
    =0+0+75
    =75

  2. ( 52 – 16 – 34 ) – ( 52 – 34 )
    = 52 – 16 – 34 – 52 + 34
    = ( 52 – 52 ) – 16 + ( -34 + 34 )
    = 0 – 16 + 0
    = -16
    $\text{ ______________________________ }$
    -2003 + ( -21 + 75 + 2003 ) + 21
    = -2003 – 21 + 75 + 2003 + 21
    = ( -2003 + 2003 ) + ( -21 + 21 ) + 75
    = 0 + 0 + 75
    = 75

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