tolong di jawab yaaa no 11 , 12 , 13 pake caraaa

11)L=s×s
=8×8=64 cm2
=64×200
=12.800
=12.800/10000
=1,28 m2

12)
[tex] \frac{4}{15} + \frac{3}{12} \\ = \frac{16}{60} + \frac{15}{60} \\ = \frac{31}{60} [/tex]
13)
[tex] \frac{3}{25} \times \frac{4}{4} \\ = \frac{12}{100} \\ = 12\% [/tex]