Mental Arithmetic Challenge

Microsoft Excel required
A new set of numbers every time the file is opened. Provides unlimited worksheets
5 files
15 questions in 4 columns
Can the student answer each column in less than a minute?
Photocopy the master sheet and cut each column to make 4 strips. Use Monday to Thursday
Alternatively, display on the whiteboard and create a challeng
File 1 Add single digit to single digit - see cover image
File 2 Add two digits (between 10 and 20) to two digits (between 10 and 20) e.g 11+19
File 3 Subtract a single digit from 10 20 30 and 40 e.g. 10-3 20-9 30 - 8 40-6
File 4 Subtract two digits (between 50 and 99) from two digits (between 11 and 40) . 83-15
File 5 Multiply up to 12 by up to 9 e.g. 12x5 10 x 8 4 x6....
Great resource as a lesson starter