Question

[PHƯƠNG ANH Mai]

\(\frac{15}{37}\)x{\(\frac{38}{41}\)_\(\frac{74}{45}\)} _ \(\frac{38}{41}\)x { \(\frac{15}{37}\)+ \(\frac{82}{76}\)}

tính bằng cách thuận tiện nhất

Answer 1

[nguyen van huy]

\(\frac{15}{37}\)x \(\left(\frac{38}{41}-\frac{74}{45}\right)-\frac{38}{41}\)x \(\left(\frac{15}{37}+\frac{82}{76}\right)\)

\(=\frac{15}{37}\)x \(\frac{38}{41}-\frac{15}{37}\)x \(\frac{74}{45}-\frac{38}{41}\)x \(\frac{15}{37}-\frac{38}{41}\)x \(\frac{82}{76}\)

\(=\frac{15}{37}\)x  \(\frac{38}{41}-\frac{2}{3}-\frac{38}{41}\)x  \(\frac{15}{37}-1\)

\(=\frac{15}{37}\)x  \(\frac{38}{41}\)\(-\frac{38}{41}\)x   \(\frac{15}{37}\)\(-\frac{2}{3}-1\)

\(=0-\frac{2}{3}-1=\frac{-5}{3}\)

Answer 2

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