Question

hãy rút gọn p\s sau

25.9-15.17 

-8.80-8.10 

 

Answer 1

Ta có :

\(\frac{25.9-15.17}{\left(-8\right).80-8.10}=\frac{5^2.3^2-3.5.17}{\left(-8\right).\left(80+10\right)}=\frac{3.5.\left(3.5-17\right)}{\left(-8\right).90}=\frac{15.\left(-2\right)}{\left(-8\right).90}=\frac{-30}{\left(-8\right).90}=\frac{1}{8.3}=\frac{1}{24}\)

Answer 2

\(-8 .80 - 8 . 10 \)

\(=\)\(-8 . ( 80 - 10 )\)

\(=\)\(-8 . 70\)

\(=\)\(-560\)

Answer 3

cảm ơn bạn bạn là 1 vị cứu tinh