### Teaching and Group Activities for Understanding

**Day 1 Teaching**

Demonstrate how to add 197 to 4735, using an empty number line jotting to show the addition of 200 and a hop back of 3 as we have added 3 too many. Now subtract 197 by subtracting 200 and adding 3 back on. This is our technique to add/subtract nearly numbers (near multiples of 10, 100, 1000). Repeat, adding and subtracting 1995 to/ from 4735.**Group Activities**

-- Use place value to add and subtract multiples and near multiples of 100 and 1000.

**Day 2 Teaching**

Use place value to add and subtract; add and subtract near multiples of 100, 1000 and 10,000. Sketch an empty number line jotting to show subtracting 1000, then subtracting 998, adding 2 back on as we have subtracted too much, etc.**Group Activities**

-- Use place value to add and subtract near multiples of 100, 1000 and 10,000.

**Day 3 Teaching**

Write these additions on the board: 4267 + 2784 + 3832, 8723 + 5265, 23,451 + 18,325 and 67,342 + 8,352. Ask children to discuss in pairs which they think will have the biggest answer and the smallest answer. Give reasons. Model rounding, followed by column addition to check.**Group Activities**

Use the ‘Triple trouble’ in-depth problem-solving investigation below as today’s group activity.

Or, use these activities:

-- Use column addition to add a combination of 4-digit and 5-digit numbers.