Lesson

When we subtract large numbers using the vertical algorithm, it's important we write our numbers in the correct order. Do you remember how to do this?

Find the value of 4976-3782.

Worked Solution

Idea summary

We always start from the ones place, when we work in a vertical algorithm. If we don't have enough to subtract, we can regroup from the next place to the left.

Let's see how we can solve subtraction where we may not have enough in one place to subtract. In this case, we need to regroup from the next place on the left. Let's see how to do this.

Find the value of 56\,196-44\,827.

Worked Solution

Idea summary

When subtracting, we must put the first number, our total, at the top of our algorithm. Unlike addition, which we can solve in any order, subtraction can only be solved in the order it is written.