• 言(word; speech)
• 十(ten)

Calculation is using words to count numbers one by one.

• ⺮(bamboo (radical))
• 具(tool; implement)

Ancient calculation used bamboo sticks as a tool to count numbers.

• 禾(rice plant)
• 斗(threshing floor; rice threshing area)

To classify rice grain by measuring each type with a measuring vessel.

• ⺍(two hands (indicating learning))
• 冖(roof; house)
• 子(child)

A child sitting under a roof with two hands diligently studying represents learning.

• 言(word; speech)
• 十(ten)

Calculation is using words to count numbers one by one.

• ⺮(bamboo (radical))
• 具(tool; implement)

Ancient calculation used bamboo sticks as a tool to count numbers.

• 禾(rice plant)
• 斗(threshing floor; rice threshing area)

To classify rice grain by measuring each type with a measuring vessel.

• ⺍(two hands (indicating learning))
• 冖(roof; house)
• 子(child)

A child sitting under a roof with two hands diligently studying represents learning.