Short Blocks

# Maths Year 5 Spring Addition & Subtraction

Each unit has everything you need to teach a set of related skills and concepts. 'Teaching for Understanding' provides whole-class teaching and fully differentiated adult-led group activities. ‘Problem-solving and Reasoning’ develops these skills, and includes questions to enable you to assess mastery. Practice sheets ensure procedural fluency. Extra support activities enable targeted work with children who are well below ARE.

‘UNIT PLAN’ gives you a text version of all parts of the unit to use in your school planning documentation. ‘DOWNLOAD ALL FILES’ gives you that unit plan plus all of associated documents.

## Mental and written addition/subtraction(suggested as 3 days)

### Planning and Activities

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.

### You Will Need

• ‘Mental addition and subtraction’ activity sheet (see resources)
• ‘0 to 3 line’ – 1/4s (see resources)
• ‘0 to 3 line’ – 1/8s (see resources)
• ‘Nearly numbers answers’ (see resources, enlarge to A3, then cut up into cards)
• Glue sticks
• ‘Nearly numbers (2) answers’ (see resources, cut up into cards)
• Place value chart (see resources, enlarge to A3)
• Additional activity sheets (see resources)
• Blue and red counters

### Mental/Oral Maths Starters

Day 1
Place value in 4-digit and 5-digit numbers (pre-requisite skills)

Suggested for Day 2
Count in 1/4s and 1/8s (simmering skills)

Suggested for Day 3
Addition facts to 20 (simmering skills)

### Worksheets

Day 1
Add and subtract from 4 and 5-digit numbers:
- using place value
- recognising near multiples of 100, 1000 and 10,000.

Day 2
Use place value to add and subtract near multiples of 100 and 1000 to and from 4-digit numbers.

Day 3
Use column addition to add 4-digit numbers, 5-digit numbers and a mix.

### Mastery: Reasoning and Problem-Solving

• Predict what the 1s digit of your answer will be if you carry out the following sequence:
Subtract 9999
Subtract 999
Subtract 99
Subtract 9
What number are you left with?
• What number must I add to 9998 to get 33,454?
• What mistake has Tom made in this subtraction?
6734 – 997 = 5731
• Fill in the missing numbers.
 4 5 7 ? 8 + 1 ? 4 9 ? ? 2 ? 2 0

In-depth Investigation: Triple Trouble
Write an addition of three 4-digit numbers where the answer is between 28,550 and 28,650.

### Extra Support

Digit Dance
Using place value to add and subtract, e.g. 4582 + 300, 4582 - 50 (not crossing 10s, 100s or 1000s)