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

Toán Lớp 7: TÍnh a) -2/7 x 21/8 b) -3/4 x 12/-5 x (-25/6) c

Toán Lớp 7: TÍnh
a) -2/7 x 21/8
b) -3/4 x 12/-5 x (-25/6)
c

Comments ( 2 )

  1. a)$\frac{-2}{7}$ x $\frac{21}{8}$ = $\frac{-3}{4}$ 
    b)$\frac{-3}{4}$ x $\frac{12}{5}$ x $\frac{-25}{6}$ = $\frac{-15}{2}$ 
    #xinctlhn ạ
     

  2. a ) ( – 2 )/7 xx 21/8 = ( – 42 )/56 = 3/4
    b ) ( – 3 )/4 xx 12/-5 xx ( – 25 )/6 = 9/5 xx ( – 25 )/6 = 15/2
     

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

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