上一节数学课——用英语怎么说

Answer 1

have a maths lesson 这是第一种意思 这里上是动词
last maths lesson 这是第二种意思 这里上是介词

Answer 2

the last math class或者the math class we had last time

Answer 3

have a math class

Answer 4

The last math lesson

Answer 5

have a math class