• 言(word; speech)
• 十(ten)

Calculation is using words to count numbers one by one.

• 八(divide; separate; eight)
• 刀(knife; blade; sword)

Using a knife to chop something in half represents division or separation.

• 上(above; top)
• 卜(divination; insert downward)

Something stuck is what stays on top and cannot come down, blocked from moving.

• 言(word; speech)
• 十(ten)

Calculation is using words to count numbers one by one.

• 八(divide; separate; eight)
• 刀(knife; blade; sword)

Using a knife to chop something in half represents division or separation.

• 上(above; top)
• 卜(divination; insert downward)

Something stuck is what stays on top and cannot come down, blocked from moving.