Question

Tinh gia tri bieu thuc

\(C=\frac{38}{45}-\left(\frac{8}{45}-\frac{17}{51}-\frac{3}{11}\right)\)

Answer 1

\(C=\frac{38}{45}-\left(\frac{8}{45}-\frac{17}{51}-\frac{3}{11}\right)\\ =\frac{38}{45}-\frac{8}{45}+\frac{1}{3}+\frac{3}{11}\\ =\frac{30}{45}+\frac{1}{3}+\frac{3}{11}\\ =\frac{2}{3}+\frac{1}{3}+\frac{3}{11}\\ =1+\frac{3}{11}=\frac{14}{11}\)

Chúc bạn học tốt nha.

Answer 2

\(C=\frac{38}{45}-\left(\frac{8}{45}-\frac{17}{51}-\frac{3}{11}\right)\)

\(C=\frac{38}{45}-\left(-\frac{212}{495}\right)\)

\(C=\frac{14}{11}.\)

Chúc bạn học tốt!

Answer 3

\(C=\frac{28}{45}-\left(\frac{8}{45}-\frac{17}{51}-\frac{3}{11}\right)\)

\(\Leftrightarrow C=\frac{28}{45}-\frac{8}{45}+\frac{1}{3}+\frac{3}{11}\)

\(\Leftrightarrow C=\frac{30}{45}+\frac{1}{3}+\frac{3}{11}=\frac{2}{3}+\frac{1}{3}+\frac{3}{11}\)

\(\Leftrightarrow C=1+\frac{3}{11}=\frac{14}{11}\)

Vậy : \(C=\frac{14}{11}\).