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

Toán Lớp 5: Tính bằng cách thuận tiện nhất: 19/4+37/100+1/8+132/25+5/2+37/12

Toán Lớp 5: Tính bằng cách thuận tiện nhất: 19/4+37/100+1/8+132/25+5/2+37/12

Comments ( 2 )

  1. Đặt A =19/4 +37/100+1/8 +132/25 +5/2 + 37/12
    A =19/4 +37/100+1/8 +132/25 +5/2 + 37/12
    = ( 19/4 + 1/8 + 37/12+ 5/2) + ( 132/25 + 37/100)
    = ( 114/24 + 3/24 + 60/24 + 74/24) + (528/100 + 37/100)
    = 251/24 + 565/100
    = 251/24 + 113/20
    = 1255/120 + 678/120
    = 1933/120
    Vậy A = 1933/120
    @Active Activity
     

  2. 19/4 + 37/100 + 1/8 + 132/25 + 5/2 + 37/12
    = (19/4 + 1/8 + 5/2 + 37/12) + (37/100 + 132/25)
    = (114/24 + 3/24 + 60/24 + 74/24) + (37/100 + 528/100)
    = 251/24 + 113/20
    = (1255 + 678)/120
    = 1933/120

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

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