Column addition with regrouping
Add numbers in columns, carrying between place-value columns.
Taught in Primary 3 in Nigeria (NERDC), Year 3 in United Kingdom (National Curriculum), Grade 4 in Canada (Ontario).
Nigeria (NERDC)
Primary 3
- Strand
- Basic Operations
- Called
- Column addition with regrouping
- How it's taught
- Carrying shown as a small digit above the next column; learners recite 'write down the ones, carry the tens'.
United Kingdom (National Curriculum)
Year 3
- Strand
- Addition and Subtraction
- Called
- Column addition with regrouping
- How it's taught
- Concrete–pictorial–abstract progression: bar models and number lines before formal columnar addition/subtraction with exchanging.
Canada (Ontario)
Grade 4
- Strand
- Number
- Called
- Column addition with regrouping
- How it's taught
- Ontario consolidates the standard algorithm in Grade 4, after flexible decomposition strategies; students compare it with their own methods.