Task 2

Read Nadia's diary below. Then, answer the following questions.

    Today at school was terrible. I was sad because I left some things at home.
    First, I had PE class. But I couldn't join to play volleyball because I didn't bring my PE kit. Next, there was maths class. But I forgot to bring calculator. I calculated the problems manually. It took so long to do. Then, I joined art class. But I dripped my paint on uniform because I left the apron at home. This morning I folded the apron, but I didn't put it away into my bag.
    Finally, I came home. I was sad. I won't let that happen again. Tomorrow, I will be more careful.

What happened in maths class?