Pagina 17 de santillana matemáticas noveno año actividad 18 hasta la e
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[tex] - \frac{11}{23} - \frac{2}{3} = [/tex]
[tex] - \frac{27}{12} \div \frac{81}{4} = [/tex]
[tex] \frac{5}{2} \times \frac{8}{20} = [/tex]
[tex] \frac{3}{5} + ( - \frac{4}{6} ) = [/tex]
[tex] \frac{9}{6} - \frac{8}{3} = [/tex]
[tex] \frac{26}{21} - 2 \frac{1}{6} = [/tex]
[tex] - \frac{2}{9} \times \frac{3}{10} = [/tex]
[tex] \frac{7}{4} \div ( - \frac{3}{2} ) = [/tex]
[tex] \frac{7}{15} \div \frac{21}{45 } = [/tex]


[tex] \frac{1}{3} + ( - \frac{4}{9} ) = [/tex]


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