[tex]1.5 + 3.(3) + 2.1(6)[/tex]
[tex] = \frac{15}{10} + \frac{33 - 3}{9} + \frac{216 - 21}{90} [/tex]
[tex] = \frac{15}{10} + \frac{30}{9} + \frac{195}{90} [/tex]
[tex] = \frac{3}{2} + \frac{10}{3} + \frac{39}{18} [/tex]
[tex] = \frac{3}{2} + \frac{10}{3} + \frac{13}{6} [/tex]
[tex] = \frac{9}{6} + \frac{20}{6} + \frac{13}{6} [/tex]
[tex] = \frac{9 + 20 + 13}{6} [/tex]
[tex] = \frac{42}{6} [/tex]
[tex] = 7[/tex]
[tex]3.2(6) + 0.8 + 2.(3)[/tex]
[tex] = \frac{326 - 32}{90} + \frac{8}{10} + \frac{23 - 2}{9} [/tex]
[tex] = \frac{294}{90} + \frac{8}{10} + \frac{21}{9} [/tex]
[tex] = \frac{98 }{30} + \frac{4}{5} + \frac{7}{3} [/tex]
[tex] = \frac{49}{15} + \frac{4}{5} + \frac{7}{3} [/tex]
[tex] = \frac{49}{15} + \frac{12}{15} + \frac{35}{15} [/tex]
[tex] = \frac{49 + 12 + 35}{15} [/tex]
[tex] = \frac{96}{15} [/tex]
[tex] = \frac{32}{5} [/tex]
[tex]1.2(6) + 0.75 + 0.(3)[/tex]
[tex] = \frac{126 - 12}{90} + \frac{75}{100} + \frac{3}{9} [/tex]
[tex] = \frac{114}{90} + \frac{75}{100} + \frac{3}{9} [/tex]
[tex] = \frac{38}{30} + \frac{3}{4} + \frac{1}{3} [/tex]
[tex] = \frac{19}{15} + \frac{3}{4} + \frac{1}{3} [/tex]
[tex] = \frac{76}{60} + \frac{45}{60} + \frac{20}{60} [/tex]
[tex] = \frac{76 + 45 + 20}{60} [/tex]
[tex] = \frac{139}{60} [/tex]
[tex]1.(6) + 0.2(7) + 0.25[/tex]
[tex] = \frac{16 - 1}{9} + \frac{27 - 2}{90} + \frac{25}{100} [/tex]
[tex] = \frac{15}{9} + \frac{25}{90} + \frac{25}{100} [/tex]
[tex] = \frac{5}{3} + \frac{5}{18} + \frac{1}{4} [/tex]
[tex] = \frac{60}{36} + \frac{10}{36} + \frac{9}{36} [/tex]
[tex] = \frac{60 + 10 + 9}{36} [/tex]
[tex] = \frac{79}{36} [/tex]
