lam hộ mik

lam hộ mik
lam-ho-mik

0 thoughts on “lam hộ mik”

  1. a) $\frac{-7}{25}$ + $\frac{18}{-25}$ +$\frac{4}{23}$+ $\frac{5}{7}$ +$\frac{19}{23}$

    = ($\frac{-7}{25}$ + $\frac{-18}{25}$ )+($\frac{4}{23}$ +$\frac{19}{23}$)+ $\frac{5}{7}$

    =-1+1+ $\frac{5}{7}$

    = $\frac{5}{7}$

    b) $\frac{7}{19}$.$\frac{8}{11}$ +$\frac{7}{19}$.$\frac{3}{11}$+$\frac{12}{19}$

    =$\frac{7}{19}$.($\frac{8}{11}$+$\frac{3}{11}$)+$\frac{12}{19}$

    =$\frac{7}{19}$+$\frac{12}{19}$

    =1

    c)8$\frac{2}{7}$ -(3$\frac{4}{9}$+4 $\frac{2}{7}$ )

    =(8$\frac{2}{7}$ -4 $\frac{2}{7}$ ) -3$\frac{4}{9}$

    =4-3$\frac{4}{9}$

    =$\frac{5}{9}$

    d)$\frac{-7}{9}$.$\frac{8}{11}$ +$\frac{-7}{9}$.$\frac{3}{11}$+1$\frac{7}{9}$

    =$\frac{-7}{9}$.($\frac{8}{11}$+$\frac{3}{11}$)+1$\frac{7}{9}$

    =$\frac{-7}{9}$+1$\frac{}{9}$

    =0

    e)$\frac{7}{35}$.$\frac{10}{19}$ +$\frac{7}{35}$.$\frac{9}{19}$-$\frac{2}{35}$

    =$\frac{7}{35}$.($\frac{10}{19}$+$\frac{9}{19}$)-$\frac{2}{35}$

    =$\frac{7}{35}$-$\frac{5}{35}$

    =$\frac{1}{7}$

    f)(-25).125.4.(-8).(-17)

    =[(-25).4].[125.(-8)].(-17)

    =(-100).(-1000).(-17)

    =(-1700000)

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