Teaching and Group Activities for Understanding
Day 1 Teaching
Practise rounding to the nearest 100. Then round to the nearest 1000 and the nearest 100 to approximate totals of pairs of 4-digit numbers. Use column addition to find the exact totals, revising leaving an empty row for extra 10s, 100s etc.
Further Teaching with Y6
Use the same method to add pairs of 5-digit numbers (answer less than 100,000).
Y5 -- Use column addition to add pairs of 4-digit numbers, recognising that some calculations produce an extra 10, 100, or 1000. Some children will add pairs of 5-digit numbers.
Y6 – Create pairs of 5-digit numbers; use column addition to add them. Some children will aim for a target range for the total.
Day 2 Teaching
Using a table of hits on a website, find totals, modelling how to use column addition of 5-digit numbers (answers less than 100,000, then greater than 100,000).
Use the in-depth problem-solving investigation ‘Giant domino addition’ as today’s group activity.
Or, use these activities:
Y5 -- Use column addition to add pairs of 5-digit numbers. Some children will aim for a target range for the total of two 4-digit numbers.
Y6 -- Create pairs of 5-digit numbers with totals between 50,000 and 100,000 or totals close to 100,000 or 150,000, using given digits.