Addition Strategies
Year 4 students learn efficient mental and written strategies to add numbers, including partitioning, compensating, and using place value.
What You Need to Know
Key Concept Diagram
Partitioning splits numbers into hundreds, tens and ones to add easily
The compensation strategy rounds a number up then subtracts the extra
Using known basic facts speeds up more complex additions
Estimating first helps you check whether your answer is reasonable
Key Vocabulary
Partition
Split a number into parts based on place value
Compensate
Adjust an answer after rounding a number up or down
Estimate
A quick approximate answer used to check reasonableness
Algorithm
A step-by-step written method for solving a maths problem
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
37 + 45 = ?
Question 2
Using compensation, 68 + 29 = ?
Question 3
Which strategy is best for 400 + 300?
Key Concepts Summary
- ●Partitioning splits numbers into hundreds, tens and ones to add easily
- ●The compensation strategy rounds a number up then subtracts the extra
- ●Using known basic facts speeds up more complex additions
- ●Estimating first helps you check whether your answer is reasonable