In-depth Investigation: Prime Addition Squares
Children add sets of three 3-digit numbers to find patterns in a magic square based on prime numbers.
In-depth Investigation: Subtraction Surprise
Watch a short video of some calculations which lead to a surprising result! What do you notice? Can you describe the steps carried out in each calculation? Subtraction Surprise from nrich.maths.org.
In-depth Investigation: Subtraction Trios
Children look for patterns in answers when subtracting 3-digit numbers from 4-digit numbers with consecutive digits.
In-depth Investigation: Images of Addition and Subtraction
Children look at some models and images used for addition and subtraction then sort cards, thinking about the skills used. Images of Addition and Subtraction from www.ncetm.org.uk
In-depth Investigation: Mobile Subtractions
Children select 3 contiguous numbers from a mobile phone display
and create a subtraction.
Use Whole Class Activity from Day 1.