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

Toán Lớp 6: a, 2/3+1/5:3/10 b, 4/9.13/3-4/9.40/3

Toán Lớp 6: a, 2/3+1/5:3/10
b, 4/9.13/3-4/9.40/3

Comments ( 2 )

  1. a)
    2/3 + 1/5 : 3/10
    =  2/3 + 1/5 . 10/3
    =  2/3 + 2/3
    = 4/3
    b)
    4/9 . 13/3 – 4/9 . 40/3
    = 4/9 . (13/3- 40/3)
    = 4/9 . (-9)
    = -4

  2. a, $\frac{2}{3}$+ $\frac{1}{5}$: $\frac{3}{10}$ 
    =$\frac{2}{3}$+ $\frac{2}{3}$ 
    =$\frac{4}{3}$ 
    b,$\frac{4}{9}$ . $\frac{13}{3}$ – $\frac{4}{9}$ . $\frac{40}{3}$ 
    =$\frac{4}{9}$ . ($\frac{13}{3}$ – $\frac{40}{3}$) 
    =$\frac{4}{9}$ . (-9)
    =-4

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

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