Adding two 2-digit numbersIn this lesson we will be identifying which known number bonds will help us to add two 2-digit numbers and use known facts to derive new addition facts.
Subtracting two 2-digit numbersIn this lesson we will be identifying which known number bonds will help us subtract a 2-digit number from a 2-digit number.
Adding and subtracting two 2-digit numbersIn this lesson we will be applying our knowledge of number bonds within ten to derive 2-digit addition and subtraction number facts within 100.
Exploring strategies to add three 1-digit numbersIn this lesson, we will be applying our knowledge of strategies such as number bonds to 10 and 20, doubles and near doubles to add three 1-digit numbers.