abacus
arithmetic
boy
brain
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calculation
calculator
caucasian
child
childhood
class
classroom
clever
concentration
concept
count
cute
education
educational
elementary
fun
genius
hand
home
homework
kid
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learning
lesson
little
math
mental
mental arithmetic
mind
number
online
play
preschool
preschooler
remote learning
school
smart
soroban
student
study
table
think
thinking
young
定額
Little preschooler counting large numbers on his fingers using mental arithmetic, concept of the development of the two hemispheres of the child's brain.の素材 [FY310206299673]
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