Know Subtraction Facts
We start with some revision of subtracting 2-digit numbers mentally and using the vocabulary of subtraction. Negative numbers are introduced by subtracting a larger number from a smaller number with the help of a number line. Don't forget to try the timed challenge, subtracting decimals as fast as you can, as well as the maze game. Click in the maze to start and watch out for the tiger!
There are some really helpful strategies here to assist with subtracting mentally, including finding a difference either side of a multiple of 100 and subtracting 99 from a number. There is also help at hand to subtract single digits from any number, as well as a fun subtracting whole tens game.
By the end of the year children should be using the standard written method for subtraction. We show some of the stages leading up to this before finishing with using the efficient written method for subtracting 3-digit numbers. Have a go on the computer before printing some worksheets to try with pencil and paper.