at maths or in maths

[allthewayanime]

Which preposition should I use :

e.g. What have you done in Maths/at Maths?

[bhaisahab]

Which preposition should I use :

e.g. What have you done in Maths/at Maths?

"in"

[billmcd]

Which preposition should I use :

e.g. What have you done in Maths/at Maths?

"In" and AmE, "Math"

[allthewayanime]

Thank you. And what about this sentence:

Let's go to/at the first page.

[bhaisahab]

Thank you. And what about this sentence:

Let's go to/at the first page.

Probably "to", although a context could be made for "at", colloquially you might hear "Let's go at the first page!", meaning start studying it.