Number Crunch Game/Activity - Warm Up Note to Parents/Guardians: You can use this activity on different days by simply changing the ‘number of the day’. Activity: Ask an adult to choose a 3- or 4- digit number and write the number at the top of the page. All activities relate to the number you have been given (just like we've done in class). Complete your task around the number of the day/week. Extension: Times tables: Students to listen, read or write out times tables for 10 minutes.