Choose methods for add/subt problems
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.
Decimal/fraction equivalents, 10/100ths
In-depth Investigation: Target Timings
Children add or subtract ones, tenths or hundredths to reach a target number. They use mathematical reasoning to choose the best strategies.
Introduction: 1- and 2-place decimals
In-depth Investigation: Connect 3
Children play a dice game on a 0–10 number line, aiming to get three numbers in a row.
Column add/subt with 3- & 4-digit numbers
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
Column subtraction, 3- & 4-digit 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.
Equivalent fractions; fraction problems
In-depth Investigation: Fancy Fraction Answers
Children find non-unit fractions of multiples and look for patterns.