2
4
add
addition
answer arithmetic
calculate
calculation
change
class
classroom
concept
cube
dice
easy
educate
education
elementary
equal
equation
finger
flip
formula
four
green
hand
learn
lesson
male
man
math
mathematical
mathematics
number
pisa
plus
primary
question
school
sign
simple
solution
solving
study
symbol
teach
teacher
text
turn
two
word
定額
Teaching mathematics. Hand turns a cube and solves and equation. Business and educational concept. Beautiful white background, copy space.の素材 [FY310156329753]
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