Question

thực hiện các phép tính sau : 

a) -10/11 x 8/9 + 7/18 x 10/11 

 

 

Answer 1

\(\frac{-10}{11}×\frac{8}{9}+\frac{7}{18}×\frac{10}{11}\)

\(=\frac{10}{11}×\frac{-16}{18}+\frac{7}{18}×\frac{10}{11}\)

\(=\left(\frac{-16}{18}+\frac{7}{18}\right)×\frac{10}{11}\)

\(=\frac{1}{2}×\frac{10}{11}=\frac{5}{11}\)

Answer 2

\(\text{Giải :}\)

\(\frac{-10}{11}×\frac{8}{9}+\frac{7}{18}×\frac{10}{11}\)

\(=\frac{10}{11}×\frac{-16}{18}+\frac{7}{18}×\frac{10}{11}\)

\(=\left(\frac{-16}{18}+\frac{7}{18}\right)×\frac{10}{11}\)

\(=\frac{1}{2}×\frac{10}{11}\)

\(=\frac{5}{11}\)

\(\text{#Hok tốt!}\)

Answer 3

Ta có:

\(\frac{-10}{11}\times\frac{8}{9}+\frac{7}{18}\times\frac{10}{11}\)

\(=\frac{10}{11}\times\left(-\frac{8}{9}+\frac{7}{18}\right)\)

\(=\frac{10}{11}\times\left(-\frac{16}{18}+\frac{7}{18}\right)\)

\(=\frac{10}{11}\times\left(-\frac{9}{18}\right)\)

\(=\frac{10}{11}\times\left(-\frac{1}{2}\right)\)

\(=-\frac{10\times1}{11\times2}\)

\(=-\frac{5\times1}{11\times1}=-\frac{5}{11}\)

HOK TỐT

NHỚ CHO TUI 1 K

Answer 4

\(\text{Mình nhầm xíu :}\)

\(\frac{-10}{11}×\frac{8}{9}+\frac{7}{18}×\frac{10}{11}\)

\(=\frac{10}{11}×\frac{-16}{18}+\frac{7}{18}×\frac{10}{11}\)

\(=\left(\frac{-16}{18}+\frac{7}{18}\right)×\frac{10}{11}\)

\(=\frac{-1}{2}×\frac{10}{11}=\frac{-5}{11}\)

Answer 5

\(\text{Mình nhầm xíu :}\)

\(\frac{-10}{11}×\frac{8}{9}+\frac{7}{18}×\frac{10}{11}\)

\(=\frac{10}{11}×\frac{-16}{18}+\frac{7}{18}×\frac{10}{11}\)

\(=\left(\frac{-16}{18}+\frac{7}{18}\right)×\frac{10}{11}\)

\(=\frac{-1}{2}×\frac{10}{11}=\frac{-5}{11}\)

\(\text{#Hok tốt!}\)

Answer 6

\(\frac{-10}{11}\)\(\times\)\(\frac{8}{9}\)\(+\)\(\frac{7}{18}\)\(\times\)\(\frac{10}{11}\)

\(=\)\(\frac{10}{11}\)\(\times\)\(\left(\frac{-8}{9}+\frac{7}{18}\right)\)

\(=\)\(\frac{10}{11}\)\(\times\)\(\left(\frac{-16}{18}+\frac{7}{18}\right)\)

\(=\)\(\frac{10}{11}\)\(\times\)\(\left(\frac{-9}{18}\right)\)

\(=\)\(\frac{10}{11}\)\(\times\)\(\left(\frac{-1}{2}\right)\)

\(=\)\(\frac{-10}{22}\)

\(=\)\(\frac{-5}{11}\)

Hok tốt