ANSWER:
13. ) A - 2 7/16
14. ) A - 7 1/16
15. ) A - 13
SOLUTION:
13. ) [tex]10\frac{5}{16} -7\frac{7}{8}[/tex]
[tex]=(10-7)+(\frac{5}{16} -\frac{7}{8} )[/tex]
[tex]=3+\frac{5}{16}-\frac{7\:\times\:2}{8\:\times\:2}[/tex]
[tex]=3+\frac{5\:-\:14}{16}[/tex]
[tex]=3+\frac{-9}{16}[/tex]
[tex]=2\frac{7}{16}[/tex]
14. ) [tex]6\frac{5}{16} +\frac{3}{4}[/tex]
[tex]=(6+0)+(\frac{5}{16}+\frac{3}{4})[/tex]
[tex]=6+\frac{5}{16} +\frac{3\:\times\:4}{4\:\times\:4}[/tex]
[tex]=6+\frac{5\:+\:12}{16}[/tex]
[tex]=6+\frac{17}{16}[/tex]
[tex]=6+1\frac{1}{16}[/tex]
[tex]=7\frac{1}{16}[/tex]
15. ) [tex]7\frac{4}{5} \div\frac{3}{5}[/tex]
[tex]=\frac{39}{5} \times\frac{5}{3}[/tex]
[tex]=\frac{39\:\times\:5}{5\:\times\:3}[/tex]
[tex]=\frac{195}{15}[/tex]
[tex]=\frac{195\:\div\:15}{15\:\div\:15}[/tex]
[tex]=13[/tex]
