英文關鍵字
activity
arithmetic
chalk
child
childhood
concentrated
count
decides
educate
education
elementary
girl
idea
kid
learn
lesson
logic
math
mathematics
numbers
primary
program
pupil
school
simple
smile
student
study
tasks
think
英文關鍵字
activity
arithmetic
chalk
child
childhood
concentrated
count
decides
educate
education
elementary
girl
idea
kid
learn
lesson
logic
math
mathematics
numbers
primary
program
pupil
school
simple
smile
student
study
tasks
think