Adding and subtracting ones and tens to and from 2-digit numbers
Why this, why now
In this unit pupils will add and subtract 1s and 10s from 2 digit numbers. They will use number facts to add/subtract a single-digit number to/from a 2-digit number. They will use a part-part-whole model to represent addition and subtraction.
Prior knowledge requirements
- Ardaydu waa inay yaqaanaan aasaaska maadada.
- Ardaydu waa inay awoodaan inay raacaan tilmaamo fudud.
Unit 6 / 19
Adding and subtracting ones and tens to and from 2-digit numbers
In this unit pupils will add and subtract 1s and 10s from 2 digit numbers. They will use number facts to add/subtract a single-digit number to/from a 2-digit number. They will use a part-part-whole model to represent addition and subtraction.
15 lessons- Use number facts to solve problems in measures and data contexts
- Add by bridging a multiple of ten
- Use bridging to solve addition and subtraction problems
- Find 10 more or less than a 2-digit number.
- Use number bonds to 10 to add/subtract one-digit and two-digit numbers
- Add and subtract one to or from a two-digit number within a decade
- Subtract by bridging a multiple of ten
- Add and subtract 1 to and from a 2-digit number crossing the tens boundary
- Use number facts to solve addition and subtraction problems.
- Use number facts to add or subtract a one-digit number and a two-digit number.
- Add and subtract 10 to and from a 2-digit number.
- Add multiples of 10 to 2-digit numbers.
- Partition 2-digit numbers in different ways
- Subtract multiples of ten from 2-digit numbers
- Use efficient strategies to solve problems