Solving simple linear equations with an additive step
I can solve a linear equation requiring a single additive step.
Solving simple linear equations with an additive step
I can solve a linear equation requiring a single additive step.
Lesson details
Key learning points
- An equation involving an additive step can be represented with a bar model.
- Using the bar model you can write all the arrangements of the equation with an additive step.
- One of the arrangements will give the solution to the equation.
- This can be written algebraically to find the solution.
Common misconception
When solving x - 5 = 10 pupils may see the -5 and calculate 10 - 5 = 5
Focus on understanding zero pairs and why adding the additive inverse gives the solution. Bar models are a helpful representation here.
Keywords
Additive inverse - The additive inverse of a number is a number that, when added to the original number, gives the sum of 0
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Video
Loading...
Starter quiz
6 Questions
$$3$$ -
$$−3$$
$$-3$$ -
$$3$$
$$1\over 3$$ -
$$−{1\over 3}$$
$$−{1\over 3}$$ -
$$1\over 3$$
$$0.3$$ -
$$−0.3$$
$$10\over 3$$ -
$$−{10\over 3}$$
Exit quiz
6 Questions
