Question

thực hiện phép tính

\(\dfrac{7}{13}\times\dfrac{8}{11}+\dfrac{7}{13}\times\dfrac{12}{11}-\dfrac{7}{13}\times\dfrac{9}{11}\)

giúp mình nhé

Answer 1

Giải:

\(\dfrac{7}{13}.\dfrac{8}{11}+\dfrac{7}{13}.\dfrac{12}{11}-\dfrac{7}{13}.\dfrac{9}{11}\)

\(=\dfrac{7}{13}.\left(\dfrac{8}{11}+\dfrac{12}{11}-\dfrac{9}{11}\right)\)

\(=\dfrac{7}{13}.1\)

\(=\dfrac{7}{13}\)

Vậy giá trị của biểu thức trên là \(\dfrac{7}{13}\).

Chúc bạn học tốt!!!

Answer 2

\(\dfrac{7}{13}.\dfrac{8}{11}+\dfrac{7}{13}.\dfrac{12}{11}-\dfrac{7}{13}.\dfrac{9}{11}\)

=\(\dfrac{7}{13}\left(\dfrac{8}{11}+\dfrac{12}{11}-\dfrac{9}{11}\right)\)

=\(\dfrac{7}{13}.\dfrac{11}{11}=\dfrac{7}{13}.1=\dfrac{7}{13}\)

Answer 3

\(\dfrac{7}{13}.\dfrac{8}{11}+\dfrac{7}{13}.\dfrac{12}{11}-\dfrac{7}{13}.\dfrac{9}{11}\)

= \(\dfrac{7}{13}.\left(\dfrac{8}{11}+\dfrac{12}{11}-\dfrac{9}{11}\right)\)

= \(\dfrac{7}{13}.1\)

= \(\dfrac{7}{13}\)

Answer 4

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