Bài làm nek:
A=1$\frac{3}{5}$ + (3$\frac{2}{5}$-2)
= 1$\frac{3}{5}$ + 3$\frac{2}{5}$-2
= (1$\frac{3}{5}$ + 3$\frac{2}{5}$)-2
= 4$\frac{5}{5}$ -2
= 5-2
=3
B=($\frac{-5}{24}$ + 0,75 + $\frac{7}{12}$ ) : (-2 $\frac{1}{8}$)
=B=($\frac{-5}{24}$ + 0,75 + $\frac{7}{12}$ : (-2 $\frac{1}{8}$)
=$\frac{-5}{24}$ + $\frac{3}{4}$ + $\frac{7}{12}$ : (-2 $\frac{1}{8}$) = $\frac{-5+18+14}{24}$ ; $\frac{-17}{8}$
= $\frac{27}{24}$ . $\frac{-8}{17}$
= $\frac{-9}{17}$
C =$\frac{3}{7}$ + ( $\frac{-1}{5}$ + $\frac{-3}{7}$)
= $\frac{3}{7}$ + $\frac{-1}{5}$ + $\frac{-3}{7}$
=( $\frac{3}{7}$ + ( $\frac{-3}{7}$) + $\frac{-1}{5}$)
= 0 + $\frac{-1}{5}$
= $\frac{-1}{5}$
D= $\frac{-5}{7}$) .$\frac{2}{11}$) + $\frac{-5}{7}$). $\frac{9}{11}$)+ 1$\frac{5}{7}$)
= $\frac{-5}{7}$) .($\frac{2}{11}$) + $\frac{9}{11}$) + 1$\frac{5}{7}$)
= $\frac{-5}{7}$) .1 + 1$\frac{5}{7}$)
= $\frac{-5}{7}$) + 1$\frac{5}{7}$)
= 1
E= (6- 2$\frac{4}{5}$). 3$\frac{1}{8}$) - 1$\frac{3}{5}$: $\frac{1}{4}$)
= ( 5$\frac{5}{5}$- 2$\frac{4}{5}$). 3$\frac{1}{8}$) - $\frac{8}{5}$.$\frac{4}{1}$
= 3$\frac{1}{5}$ .3$\frac{1}{8}$) - $\frac{32}{5}$
= $\frac{16}{5}$. $\frac{25}{8}$ -$\frac{32}{5}$
= 10 - 6$\frac{2}{5}$
= 9$\frac{5}{5}$-6$\frac{2}{5}$
= 3$\frac{3}{5}$
F= $\frac{6}{7 }$ + $\frac{5}{8}$ ;5 - $\frac{3}{16}$. $-2^{2}$
=$\frac{6}{7 }$ +$\frac{5}{8}$ . $\frac{1}{5}$ - $\frac{3}{16}$. 4
= $\frac{6}{7 }$ + $\frac{1}{8 }$- $\frac{3}{4 }$
=$\frac{6}{7 }$ + $\frac{1}{8 }$+$\frac{-3}{4 }$
= $\frac{6}{7 }$ + $\frac{1}{8 }$- $\frac{3}{4 }$
=$\frac{48+7-42}{56}$
= $\frac{13}{56}$
Mong bạn vote cho mình 5 sao và CTLHN
CHÚC BẠN HỌC TỐT NHÉ.
