Includes 12 worksheets to improve your students ability to add, subtract, multiply and divide one, two and three digit numbers. Great for differentiation within the classroom with different levels for each type of mathematical operation. Suitable for students in Years 1 – 6. Students can record how long it takes them to complete each of the 45 problems on the worksheet and aim to become quicker. Great as a maths warm up or as a fast finisher activity!