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2.08 Vertical algorithms

Lesson

Are you ready?

Are you able to use a vertical algorithm to add numbers with no regrouping?

Find the value of $41+56$41+56.

 

Learn

When we need to regroup to add or subtract, there are some different ways we can do this. Let's see how to solve an addition problem, then a subtraction problem.

 

Apply

Question 1

Find the value of $979-486$979486.

 

Learn

What happens with larger numbers? We can use a vertical algorithm to solve addition and subtraction, as we see in this video.

 

Apply

Question 2

Find the value of $2124+3351$2124+3351.

 

Learn

When we need to do some trading, or regrouping, the vertical algorithm helps us line up place value digits. Let's see how to add or subtract, when we need to regroup.

 

Apply

Question 3

Find the value of $7263-2418$72632418.

 

Remember!

Each time we move one place to the left, the value of the digit is ten times bigger. This means we are able to regroup, or trade, to help us with addition and subtraction.

Outcomes

VCMNA153

Apply place value to partition, rearrange and regroup numbers to at least tens of thousands to assist calculations and solve problems

VCMNA163

Use equivalent number sentences involving addition and subtraction to find unknown quantities

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