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

Toán Lớp 6: a,(3+3/5-7/12) b,(-3 1/4)+(-2 2/3) c,(-5/24+0,75+7/12)

Toán Lớp 6: a,(3+3/5-7/12) b,(-3 1/4)+(-2 2/3) c,(-5/24+0,75+7/12)

Comments ( 2 )

  1. a)
    (3 + 3/5 – 7/12)
    = 180/60 + 36/60 – 35/60
    = (180 + 36 – 35)/60
    = 181/60
    b)
    (-3 1/4) + (-2 2/3)
    = -13/4 + (-8/3)
    = -39/12 – 24/12
    = -63/12
    = -21/4
    c)
    (-5/24 + 0,75 + 7/12)
    = -5/24 + 18/24 + 14/24
    = 27/24

  2. Giải đáp:
    a,(3+$\frac{3}{5}$ -$\frac{7}{12}$ )
    =$\frac{18}{5}$ -$\frac{7}{12}$ 
    =$\frac{216}{60}$ -$\frac{35}{60}$ 
    =$\frac{181}{60}$ 
    b,(-3$\frac{1}{4}$) +(-2$\frac{2}{3}$ )
    =$\frac{-13}{4}$+$\frac{-8}{3}$
    =$\frac{-39}{12}$+$\frac{-32}{12}$
    =$\frac{-7}{12}$
    c,($\frac{-5}{24}$ +0,75+$\frac{7}{12}$ )
    =($\frac{-5}{24}$ +$\frac{3}{4}$ +$\frac{7}{12}$ )
    = $\frac{-5}{24}$ + $\frac{18}{24}$ + $\frac{14}{24}$ 
    = $\frac{27}{24}$ 
    = $\frac{9}{8}$ 
                @tuanbach1104      
    Lời giải và giải thích chi tiết:
     

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

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