### Teaching and Group Activities for Understanding

**Day 1 Teaching**

Use vertical place value charts to make 5-digit and 6-digit numbers, including using fewer than five cards. Work out what to subtract to ‘zap’ digits – change them to zero with one place value subtraction.**Group Activities**

Y5 -- Identify the value of digits and ‘zap’ digits using subtraction … or … Add and subtract using place value.

Y6 -- Explore place value additions and subtractions in 6-digit numbers, based on a dice roll, or by changing digits to give an answer of 555,555.

**Day 2 Teaching**

Add and subtract 1s, 10s, 100s, 1000s and 10,000s to/from 5-digit numbers, using a calculator.

**Further Teaching with Y6**

Children form a counting machine with digit cards then count on in 1s, 10s and 100s.**Group Activities**

Y5 -- Work out what to add and subtract, one step at a time, to make 55,555 or 99,999 from a starting number.

Y6 -- Work out what to add and subtract, one step at a time, to make 555,555 or 999,999 from a starting number.

**Day 3 Teaching**

Use digit cards to make smallest and largest 5-digit and 6-digit numbers possible and place approximately on landmarked lines.**Group Activities**

Use one of the in-depth problem-solving investigations in ‘Activity Set A’ from NCETM as today’s group activity.

Or, use this activity:

Whole class activity using digit cards to make 5-digit or 6-digit numbers; compare and place on landmarked lines.