He is learning to add and subtract.

他正在学习加减法。

youdao

Learning to add, pride to reduce, opportunity to multiply, lazy to delete.

学习要加，骄傲要减，机会要乘，懒惰要除。

youdao

Learning to add, pride to reduce, opportunity to multiply, lazy to delete.

学习要加，骄傲要减，机会要乘，懒惰要除。

youdao