Lesson overview:Adding and subtracting ones from a 2-digit number
- In this lesson, we will use our knowledge of number bonds within ten to begin deriving facts when adding or subtracting ones from numbers within 100.
- In this lesson, we will use our knowledge of number bonds within ten to begin deriving facts when adding or subtracting ones from numbers within 100.
Addition and subtraction of 2-digit numbers:
- Using number bonds within 20 for addition
- Using number bonds within 20 for subtraction
- Adding and subtracting ones from a 2-digit number
- Adding and subtracting multiples of ten
- Adding and subtracting tens from a 2-digit number
- Adding two 2-digit numbers
- Subtracting two 2-digit numbers
- Adding and subtracting two 2-digit numbers
- Exploring strategies to add three 1-digit numbers
- Consolidating addition and subtraction of 2-digit numbers