9 sampe 12 banyak point gogo

9.
1 kodi = 20 lembar
maka:
[tex]1 \frac{1}{4} = \frac{5}{4} \\ = \frac{5}{4} \times 20 \\ = 5 \times 5 \\ = 25 \: lembar[/tex]
jawabannya B

10.
1 rim = 500 lembar
maka:
[tex] = \frac{18}{25} \times 500 \\ = 18 \times 20 \\ = 360 \: lembar[/tex]
jawabannya D

11.
[tex]1 \frac{6}{10} = \frac{16}{10} \\ 2 \frac{3}{5} = \frac{13}{5} [/tex]
jadi:
[tex] = \frac{16}{10} + \frac{13}{5} \\ = \frac{16}{10} + \frac{13 \times 2}{5 \times 2} \\ = \frac{16}{10} + \frac{26}{10} \\ = \frac{42}{10} \\ = \frac{21}{5} \\ = 4 \frac{1}{5} [/tex]
jawabannya D

12.
[tex]3 \frac{2}{5} = \frac{17}{5} [/tex]
maka:
[tex] = \frac{17}{5} + \frac{5}{6} - \frac{7}{15} \\ = \frac{17 \times 6}{5 \times 6} + \frac{5 \times 5}{6 \times 5} - \frac{7 \times 2}{15 \times 2} \\ = \frac{102}{30} + \frac{25}{30} - \frac{14}{30} \\ = \frac{127 - 14}{30} \\ = \frac{113}{30} \\ = 3 \frac{23}{30} [/tex]
jawabannya C