### Teaching and Group Activities for Understanding

**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.**Group Activities**

-- 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.**Group Activities**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.