Question

\(\left[\frac{4}{15}-\frac{7}{20}\right]:\left[\frac{5}{18}+\frac{11}{12}\right]\)

giúp mình với

Answer 1

\(\left(\frac{4}{15}-\frac{7}{20}\right):\left(\frac{5}{18}+\frac{11}{12}\right)\)

\(=\left(\frac{16}{60}-\frac{21}{60}\right):\left(\frac{20}{72}+\frac{66}{72}\right)\)

\(=-\frac{1}{12}:\frac{43}{36}=-\frac{1}{12}.\frac{36}{43}=-\frac{3}{43}\)

Answer 2

\(\left[\frac{16}{60}-\frac{21}{60}\right]:\left[\frac{10}{36}+\frac{33}{36}\right]=-\frac{1}{12}:\frac{43}{36}=\frac{\left(-1\right).36}{12.43}=\frac{\left(-1\right).3}{1.43}=-\frac{3}{43}\)

Answer 3

[ 4/15 - 7/20 ] : [ 5/18 + 11/12 ]

= -1/12 : 37/24

= -2/37

Answer 4

\(\left(\frac{4}{15}-\frac{7}{20}\right):\left(\frac{5}{18}+\frac{1}{12}\right)=\left(-\frac{1}{12}\right):\left(\frac{13}{36}\right)\)

\(=-\frac{1}{12}\cdot\frac{36}{13}=\frac{12\cdot-3}{12\cdot13}=-\frac{3}{13}\)

Answer 5

=[-1/12]:[43/36]

=-3/43

Answer 6

\(\left(\frac{4}{15}-\frac{7}{20}\right):\left(\frac{5}{18}+\frac{11}{12}\right)\)

\(=\frac{-1}{2}:\frac{43}{36}\)

=\(\frac{-18}{43}\)