Mathematical symbols written on blackboard
Palabras clave
1,
algebra,
background,
black,
blackboard,
blackboard,
class,
colours,
counting,
dark,
education,
exercise,
figure,
formula,
geometry,
homework,
cognition,
learn,
lesson,
mathematic,
mathematical,
mathematic,
mathematic,
number,
object,
pupil,
school,
september,
student,
study,
subject,
symbol,
task,
written