Review of column addition and subtraction
Why this, why now
In this unit pupils will revisit column addition with regrouping and column subtraction with exchanging to solve problems.
Prior knowledge requirements
- Ardaydu waa inay yaqaanaan aasaaska maadada.
- Ardaydu waa inay awoodaan inay raacaan tilmaamo fudud.
Unit 1 / 25
Review of column addition and subtraction
In this unit pupils will revisit column addition with regrouping and column subtraction with exchanging to solve problems.
15 lessons- Review using column addition with regrouping in the ones and tens columns
- Review using column subtraction with regrouping from hundreds to tens
- Review using known facts and strategies to accurately and efficiently use and check column addition
- Review using column subtraction with regrouping from tens to ones
- Review adding 3-digit numbers using column addition without regrouping
- Review using column subtraction to subtract without regrouping
- Decide on the most efficient subtraction strategy, including column subtraction
- Review adding 2-digit numbers using column addition without regrouping
- Review using column addition to add 2- and 3-digit numbers by regrouping ones
- Review using column addition to add 2- and 3-digit numbers by regrouping tens
- Use column addition to solve problems in different contexts
- Review identifying the minuend and subtrahend in column subtraction
- Use knowledge of column addition to solve problems in a range of contexts
- Review and use knowledge of place value to correctly lay out column addition
- Review column addition and identify the addends and sum