奶奶教我如何使用算盘。

Grandma teaches me how to use an abacus.

老板的铁算盘从不出错。

The boss's iron abacus never makes mistakes.

小明用算盘来做数学题。

Xiaoming uses an abacus to do math problems.

这个古老的算盘是我爷爷的。

This ancient abacus belongs to my grandfather.

他在数学课上学会了使用算盘。

He learned to use an abacus in his math class.

学校里有一门关于算盘的课程。

There is a course about the abacus in the school.

他用铁算盘计算了所有的开支。

He calculated all the expenses with the iron abacus.

他用铁算盘快速算出了账目。

He used the iron abacus to quickly calculate the accounts.

我的祖父仍然能用算盘快速计算。

My grandfather can still calculate quickly with an abacus.

算盘被认为是现代计算机的先驱。

The abacus is considered a forerunner of the modern computer.