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

Toán Lớp 6: 1960 + 1968 − { 1960 + 1995 − [ 1990 + ( 1995 − 1968 ) ] } là .

Toán Lớp 6: 1960 + 1968 − { 1960 + 1995 − [ 1990 + ( 1995 − 1968 ) ] } là .

Comments ( 2 )

  1. 1960 + 1968 – {1960 + 1995 – [1990 + (1995 – 1968)]}
    = 1960 + 1968 – 1960 – 1995 + 1990 + 1995 – 1968
    = (1960 – 1960) + (1968 – 1968) + (1995 – 1995) + 1990
    = 0 + 0 + 0 + 1990
    = 1990

  2. Giải đáp+Lời giải và giải thích chi tiết:
    1960+1968-{1960+1995-[1990+(1995-1968)]}
    = 1960+1968-1960-1995+[1990+(1995-1968)]
    = 1960+1968-1960-1995+1990+(1995-1968)
    = 1960+1968-1960-1995+1990+1995-1968
    = (1960-1960)+(196861968)+(-1995+1995)+1990
    = 0+0+0+1990
    = 1990

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