英文關鍵字
math
row
accounting
calculating
calculation
calculator
colors
colourful
colours
education
infant
isolation
kindergarten
learn
learning
numbers
nursery
pupil
school
student
toy
up
years
add
bars
compute
count
counting
manual
mathematical
tool
英文關鍵字
math
row
accounting
calculating
calculation
calculator
colors
colourful
colours
education
infant
isolation
kindergarten
learn
learning
numbers
nursery
pupil
school
student
toy
up
years
add
bars
compute
count
counting
manual
mathematical
tool