Struggling to do CBE questions with calculations

Hi, this will be my first ever exam with ACCA. I’m doing the FFA exam. I’ve been practicing and while I’m doing okay when theoretical questions meaning I can answer them within a minute, I struggle with completing questions that require calculations, within 5 minutes and other times passing 5 minutes.

These questions are relating to topics like bank reconciliations, receivables, sales tax. I am sure it’s impossible to read these detailed questions and calculate them within a minute but I know that based on the time limit of the exam, it seems you only have a minute and a half per question so I am lost. Can someone please give me any advice?