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\(2\frac{1}{2}-3,4\left(12\right)-\frac{4}{3}+\frac{1}{3}\left(\frac{1}{2}+0,5-3\frac{1}{2}\right)\)
hôm nay chưa có bài tập trời ơi , ngày 31 là ngày halloween đấy
TL
= 5/2-563/165-4/3+1/3(1/2+1/2-7/2)
=5/2-563/165-4/3+1/3.-5/2=-508/165
Hok tốt
\(2\frac{1}{2}-3,4\left(12\right)-\frac{4}{3}+\frac{1}{3}\left(\frac{1}{2}+0,5-3\frac{1}{2}\right)\)
\(=\frac{5}{2}-\left(\frac{17}{5}+\frac{2}{165}\right)-\frac{4}{3}-\frac{5}{6}\)
\(=\frac{5}{2}-\frac{17}{5}-\frac{2}{165}-\frac{4}{3}-\frac{5}{6}=-\frac{508}{165}\)
c) \(\frac{0,375-0,3+\frac{3}{11}+\frac{3}{12}}{0,625-0,5+\frac{5}{11}+\frac{5}{12}}=\frac{3\left(0,125-0,1+\frac{1}{11}+\frac{1}{12}\right)}{5\left(0,123-0,1+\frac{1}{11}+\frac{1}{12}\right)}=\frac{3}{5}\)
a)
\(\begin{array}{l}\frac{1}{9} - 0,3.\frac{5}{9} + \frac{1}{3}\\ = \frac{1}{9} - \frac{3}{{10}}.\frac{5}{9} + \frac{1}{3}\\ = \frac{1}{9} - \frac{3}{{2.5}}.\frac{5}{{3.3}} + \frac{1}{3}\\ = \frac{1}{9} - \frac{1}{6} + \frac{1}{3}\\ = \frac{2}{{18}} - \frac{3}{{18}} + \frac{6}{{18}}\\ = \frac{5}{{18}}\end{array}\)
b)
\(\begin{array}{l}{\left( {\frac{{ - 2}}{3}} \right)^2} + \frac{1}{6} - {\left( { - 0,5} \right)^3}\\ = \frac{4}{9} + \frac{1}{6} - \left( {\frac{{ - 1}}{2}} \right)^3\\ = \frac{4}{9} + \frac{1}{6} - \left( {\frac{{ - 1}}{8}} \right)\\ = \frac{4}{9} + \frac{1}{6} + \frac{1}{8}\\ = \frac{{32}}{{72}} + \frac{{12}}{{72}} + \frac{9}{{72}}\\ = \frac{{53}}{{72}}\end{array}\)
\(P=\left(-0,5-\frac{3}{5}\right):\left(-3\right)+\frac{1}{3}-\left(-\frac{1}{6}\right):\left(-2\right)\)
\(P=\left(-1,1\right):\left(-3\right)+\frac{1}{3}+\frac{1}{6}:\left(-2\right)\)
\(P=\frac{11}{30}+\frac{1}{3}+\left(-\frac{1}{12}\right)\)
\(P=\frac{37}{60}\)
\(Q=\left(\frac{2}{25}-1,008\right):\frac{4}{7}:\left[\left(3\frac{1}{4}-6\frac{5}{9}\right).2\frac{2}{17}\right]\)
\(Q=\left(-0,928\right):\frac{4}{7}:\left[\left(-\frac{119}{36}\right).2\frac{2}{17}\right]\)
\(Q=\left(-1,624\right):\left(-\frac{245}{36}\right)\)
\(Q=\frac{1044}{4375}\)
A = (1 - 2/3 + 4/3) - (4/5 - 1) + (7/5 + 2)
A= (3/3 - 2/3 + 4/3) - (4/5 - 5/5) + (7/5 + 10/5)
A= 5/3 + 1/5 + 17/5
A= 5/3 +18/5
A= 25/15 + 54/15
A= 79/15
B= (-3 + 3/4 - 1/3 ) : (5 + 2/5 - 2/3)
B= (-36/12 + 9/12 - 4/12) : (75/15 + 6/15 - 10/15)
B= -31/12 : 71/15
B= -155/284
C= (3/5 - 4/5 ) . (2/7 - 3/14) - (5/9 - 7/27) . (1 - 3/5) + (1 - 11/12) . (1-11/12)
C= -1/5 . 1/14 - 8/27 . 2/5 + 1/12 . 1/12
C=-1/70 - 16/135 + 1/144
C=-216/15120 - 1792/15120 + 105/15120
C=-1903/15120
\(2\frac{1}{2}.3,4\left(12\right)-\frac{4}{3}+\frac{1}{3}.\left(\frac{1}{2}+0,5-3\frac{1}{2}\right)\)
\(=\frac{5}{2}.\frac{563}{33}-\frac{4}{3}+\frac{1}{3}.\left(\frac{1}{2}+\frac{1}{2}-\frac{7}{2}\right)\)
\(=\frac{2815}{66}-\frac{4}{3}+\frac{1}{3}.\frac{-5}{2}\)
\(=\frac{909}{22}+\frac{-5}{6}\)\(=453\frac{2}{3}\)
\(2\frac{1}{2}.3,4\left(12\right)-\frac{4}{3}+\frac{1}{3}\left(\frac{1}{2}+0,5-3\frac{1}{2}\right)\)
= \(\frac{5}{2}.\left(3,4+\frac{2}{165}\right)-\frac{4}{3}+\frac{1}{3}\left(-\frac{5}{2}\right)\)
= \(\frac{5}{2}\left(\frac{17}{5}+\frac{2}{165}\right)-\frac{4}{3}-\frac{5}{6}\)
\(=\frac{17}{2}+\frac{1}{33}-\frac{4}{3}-\frac{5}{6}\)
\(=\frac{561}{66}+\frac{2}{66}-\frac{88}{66}-\frac{55}{66}=\frac{70}{11}\)