### Planning and Activities

**Day 1 Teaching**

Discuss how to write and say 6-digit numbers. Build numbers using place value chart. Generate 6-digit numbers by rolling a dice and create an inequality. Discuss how to write 7-digit numbers. Write a number between two 7-digit numbers.**Group Activities: T with Y5**

Use the in-depth problem-solving investigation ‘Lost Digit’ as today’s group activity.

Or, use these activities:

Y5 -- Compare and use place value to subtract from 6-digit numbers; Use place value subtraction to ‘zap’ each digit in a 6-digit number.

Y6 -- Use dice rolls to construct and subtract from 7-digit numbers. Order 7-digit numbers with consecutive digits.

**Day 2 Teaching**

Use the Interactive Whiteboard calculator’s constant function to repeatedly add then subtract 1, 10, 100, 1000, 10,000 and 100,000 to 6-digit numbers. Check that children can cross the place value ‘boundaries’ when adding powers of ten.**Further Teaching with Y6**

As above but beginning with 7-digit numbers.

**Group Activities: T with Y6**

Y5 -- Subtract and/ or add 1, 10, 100, 1000, 10,000 and 100,000 to 6-digit numbers.

Y6 -- Use dice rolls to add/subtract 1, 10, 100, 1000, 10,000, 100,000 or 1,000,000 from 5,000,000. Turn a 7-digit number into 5,555,555 by adding and subtracting multiples of 1, 10, 100, 1000, 10,000, 100,000 and 1,000,000.

**Day 3 Teaching**

Place 6-digit numbers on landmarked lines and round to the nearest 100,000, 1000 and 100.

**Further Teaching with Y6**

Place 7-digit numbers on lines and round to the nearest 1,000,000, 100,000 and 10,000.

**Group Activities: T with Y6**

Y5 -- Place 6-digit numbers on landmarked or empty lines; round to the nearest 100 and 1000.

Y6 -- Mark numbers on a 2,000,000 to 3,000,000 landmarked line and round them. Round 7-digit numbers to the nearest 100, 1000, 10,000, 100,000 and 1,000,000.

**Day 4 Teaching**

Demonstrate how to use ‘add and adjust’ strategies to add ‘nearly numbers’, such as 4735 + 203, 4735 + 197, 4735 + 1995, 465 + 299, 4.65 + 2.99. Repeat to ‘subtract and adjust’ for subtraction of nearly numbers, e.g. 4735 – 705, 4735 – 197, 4735 – 1995, 6.25 – 1.98, 4.21 – 3.02.

**Group Activities: T with Y5**

Y5 -- Use place value to add and subtract multiples and near multiples of 100 and 1000.

Y6 -- Choose pairs of numbers to add and subtract, using an ‘add/subtract and adjust’ strategy, including some decimals.