Planning and Activities
Day 1 Teaching
Write 3458 + 2477, 3478 + 2827 and 3455 + 2327. Children arrange by estimation from biggest to smallest answers. Take feedback. Draw out rounding to nearest 1000 to approximate. Model column addition/find exact answers.
-- Discuss which additions of 4-digit numbers are easy/quick to do and which are harder/slower to do and why. Children then work out the answers.
-- Teach children how to add pairs of 5-digit numbers.
Day 2 Teaching
Using a table of hits on a website, find totals, modelling how to use column addition and reminding children to leave a line before the answer so that they can record the ‘carry’ digits.
Use the ‘Exasperating 80 Grand’ in-depth problem-solving investigation below as today’s group activity.
Or, use these activities:
-- Use a place value chart to generate pairs of 5-digit numbers to add.
-- Use digits 1 to 8 to create two 4-digit numbers, aiming to have a total between 6000 and 8000.