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= \(x^8.\frac{1}{10}.\frac{2}{9}.\frac{3}{8}.\frac{4}{7}.\frac{5}{6}.\frac{6}{5}.\frac{7}{4}.\frac{8}{3}.\frac{9}{2}\)
= \(x^8.\frac{1}{10}.\left(\frac{2}{9}.\frac{9}{2}\right).\left(\frac{3}{8}.\frac{8}{3}\right).\left(\frac{4}{7}.\frac{7}{4}\right).\left(\frac{5}{6}.\frac{6}{5}\right)\)
= \(x^8.\frac{1}{10}.1.1.1.1\)
= \(x^8.\frac{1}{10}\)
Mk ko pik co dung ko nua
\(\dfrac{3}{4}\times\dfrac{8}{5}:1\dfrac{1}{6}\)
=\(\dfrac{6}{5}:\) \(\dfrac{7}{6}\)
=\(\dfrac{6}{5}\times\dfrac{6}{7}=\dfrac{36}{35}\)
2\(\dfrac{1}{3}\) x 1\(\dfrac{1}{4}\) -\(\dfrac{7}{5}\)
\(\dfrac{7}{3}\times\dfrac{5}{4}-\) \(\dfrac{7}{5}\)
\(\dfrac{35}{12}-\dfrac{7}{5}\)
\(\dfrac{175}{60}-\dfrac{84}{60}=\dfrac{91}{60}\)
4\(\dfrac{2}{3}+1\dfrac{1}{4} +2\dfrac{1}{3}+2\dfrac{3}{7}\)
(4 +2) + \(\left(\dfrac{2}{3}+\dfrac{1}{3}\right)\) +1\(\dfrac{1}{4}\) + \(2\dfrac{3}{7}\)
6 + 1 + \(\dfrac{5}{4}\) + \(\dfrac{17}{7}\)
7 + \(\dfrac{103}{28}\)
\(\dfrac{299}{28}\)
4 2/5 + 5 6/9 + 2 3/4 + 3/5 + 1/3 + 1/4
= 4 + 2/5 + 5 + 6/9 + 2 + 3/4 + 3/5 + 1/3 + 1/4
= (4 + 5 + 2) + (2/5 + 3/5) + (6/9 + 1/3) + (3/4 + 1/4)
= 11 + 1 + 1 + 1
= 11 + 1 × 3
= 11 + 3
= 14
Chú ý: hỗn số vít hơi khó, phải zô Fx nên mk ngăn = dấu cách nha
Ủng hộ mk nha ☆_☆♥_♥^_-
4 2/5 + 5 6/9 + 2 3/4 + 3/5 + 1/3 + 1/4
= 4 + 2/5 + 5 + 6/9 + 2 + 3/4 + 3/5 + 1/3 + 1/4
= (4 + 5 + 2) + (2/5 + 3/5) + (6/9 + 1/3) + (3/4 + 1/4)
= 11 + 1 + 1 + 1
= 11 + 1 × 3
= 11 + 3
= 14
\(3+\frac{2}{5}-\frac{3}{4}\times\frac{4}{5}\)
\(=3+\frac{2}{5}+\frac{3}{5}\)
\(=3+1\)
\(=4\)