### Teaching and Group Activities for Understanding

**Day 1 Teaching**

Children draw a PV grid on their boards and write 3036. They add 200 and record the addition. Then subtract 30, recording this.**Group Activities**

-- Do place value additions and subtractions with 4-digit numbers, changing 1, 2 or 3 digits at a time.**Day 2 Teaching**

Display Place Value Mystery, explain that children need to use place value addition or subtraction to fill in the missing number and function in the chain.**Group Activities**Use the in-depth problem-solving investigation ‘Nice or Nasty’ from NRICH as today’s group activity.

Or, use these activities:

-- Find missing numbers in place value additions and subtractions.