Review using known facts and strategies to accurately and efficiently use and check column addition
I can use known facts and strategies to efficiently calculate and check column addition.
- Year 4
Review using known facts and strategies to accurately and efficiently use and check column addition
I can use known facts and strategies to efficiently calculate and check column addition.
Lesson details
Key learning points
- Look carefully at the numbers in a calculation. Is column addition the most efficient method to use to find the sum?
- Use strategies to help you check your calculations.
- Estimate the answer first to improve your accuracy.
Keywords
Efficient - Being efficient means finding a way to solve a problem quickly whilst also maintaining accuracy.
Estimation - Estimation means to find a value that is close enough to the right answer, usually with some thought or calculation involved.
Regrouping - The process of unitising and exchanging between place values is known as regrouping.
Common misconception
Pupils may struggle to use estimation to help them with checking addition equations.
Encourage pupils to find the nearest multiple of 10 or 100 to the numbers they are adding. They will not yet be familiar with ‘rounding’. Estimated answers do not need to be really accurate, then are just an approximation and help when checking.
Licence
Lesson video
Loading...
Prior knowledge starter quiz
6 Questions
Q1.Where will regrouping be needed in this column addition?
Q2.Where will regrouping be needed in this column addition?
Q3.Jun has started this column addition. Complete it to find the sum.
Q4.What is the missing digit?
Q5.What is the missing digit?
Q6.Look at this calculation. Which two numbers add to equal the sum?
Assessment exit quiz
6 Questions
Q1.Which equations will have a sum that is even?
Q2.Which two statements are correct for the column addition shown?
Q3.Which equations could be efficiently answered using a mental calculation?
Q4.Which calculation is the best one to estimate the sum of 154 + 247?
Q5.Alex is trying to calculate the sum of 417 and 296 Which hundreds number will be closest to his answer?
Q6.Look carefully at Alex’s column addition. Which of these statements about the sum is true?
