Short Blocks

# Maths Year 5/6 Autumn Addition & Subtraction (A)

Each unit has everything you need to teach a set of related skills and concepts.

## Column addition with whole numbers(suggested as 2 days)

### Planning and Activities

Day 1 Teaching
Practise rounding to the nearest 100. Then round to the nearest 1000 and the nearest 100 to approximate totals of pairs of 4-digit numbers. Use column addition to find the exact totals, revising leaving an empty row for extra 10s, 100s etc.
Further Teaching with Y6
Use the same method to add pairs of 5-digit numbers (answer less than 100,000).
Group Activities
Y5 -- Use column addition to add pairs of 4-digit numbers, recognising that some calculations produce an extra 10, 100, or 1000. Some children will add pairs of 5-digit numbers.
Y6 – Create pairs of 5-digit numbers; use column addition to add them. Some children will aim for a target range for the total.

Day 2 Teaching
Using a table of hits on a website, find totals, modelling how to use column addition of 5-digit numbers (answers less than 100,000, then greater than 100,000).
Group Activities
Use the in-depth problem-solving investigation ‘Giant domino addition’ as today’s group activity.
Or, use these activities:
Y5 -- Use column addition to add pairs of 5-digit numbers. Some children will aim for a target range for the total of two 4-digit numbers.
Y6 -- Create pairs of 5-digit numbers with totals between 50,000 and 100,000 or totals close to 100,000 or 150,000, using given digits.

### You Will Need

• Mini-whiteboards and pens
• Flipchart and pens
• Place value equipment
• 1s to 10,000s place value chart (see resources)
• Blue and red counters
• Blue and red pens
• A table to show the numbers of hits on a website (see resources)
• 0–8 digit cards

### Short Mental Workouts

Day 1
Round to the nearest multiple of 100

Day 2

### Worksheets

Day 1
Y5: Add 4-digit then 5-digit numbers.

Day 2
Y5: Approximate then add pairs of 4-digit numbers. Add pairs of 5-digit numbers from a table of hits on a website.

### Mastery: Reasoning and Problem-Solving

Y5

• Fill in the missing digits:

 ☐ ☐ 3 8 4 + 7 9 8 ☐ ☐ ☐ 5 2 2 ☐
• Write an addition of two 5-digit numbers using the digits 4, 5 and 6 where the answer is 70,000.

Y6

• Write the missing digits:
3 4 7 1 9 + ☐ 6 5 ☐ ☐ = 7 ☐ ☐ 0 8
• Write an addition where the two 5-digit numbers add to 55,555. Neither number has a 0 and you must use 6, 7, 8 and 9 as digits somewhere. You can use other digits too!