Introduce the vertical subtraction algorithm with these teaching slides, showing students how to solve 3 digit subtraction problems using hundreds, tens and ones columns. Students explore when and how to regroup, trading 1 ten for 10 ones when the digit being subtracted is larger than the digit available, then practise solving subtraction problems step by step.
What's included:
Introductory slides explaining what an algorithm is and how to record subtraction using the hundreds, tens and ones columns
Worked examples using the algorithm alongside visual place value models, with clear regrouping explanations
7 practice slides for students to solve independently, with answers revealed one at a time