Short Blocks

# Maths Year 4 Summer Addition & Subtraction (A)

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

## Column addition, including money(suggested as 2 days)

### Planning and Activities

Day 1 Teaching
Write 426 + 257 + 582 and 275 + 446 + 385. Estimate the answer to each addition. Point out that lots of the numbers round up so looking at the first digit only does not give a good estimate. Model using compact addition for the first addition. Compare with children’s estimates. Children use compact addition for 2nd addition, then for 726 + 457 + 582.
Group Activities
-- Whole class investigation: Apply compact addition skills to add trios (or pairs) of 3-digit numbers, aiming for given target totals.

Day 2 Teaching
Show a complete compact addition for £3.55 + £2.76. Ask children to explain to their partners how this was done, talking through each stage. Discuss each stage. Show books with price labels: £4.79, £5.49, £5.25, £4.65, £4.29. Children collaborate to find totals of pairs for under £10.
Group Activities
-- Add pairs of amounts of money using expanded and then compact addition.
-- Choose the most efficient method to add pairs of 3-digit amounts (some money).
-- Apply compact addition skills to add trios of 3-digit amounts of money.

### You Will Need

• Mini-whiteboards and pens
• Books with price labels: £4.79, £5.49, £5.25, £4.65, £4.29
• ‘Adding amounts of money’ (see resources)
• Flipchart and pens
• ITP: Number Grid

### Mental/Oral Maths Starters

Day 1
Add 3 multiples of 10 (pre-requisite skills)

Suggested for day 2
8 times table (simmering skills)

### Worksheets

Day 1
Use a written method to add pairs, or trios, of 3-digit numbers. Estimate answers by rounding numbers to the nearest 10.

Day 2
Use expanded and compact column addition to find totals of pairs of amounts of money. Estimate whether totals are <£10 or >£10.
Estimate totals and use compact column addition to find totals of pairs of amounts of money.

### Mastery: Reasoning and Problem-Solving

• Write these 2 numbers in expanded form, i.e. as hundreds + tens + ones:
475
205
Add them mentally; write the total.
• Complete these using column addition:
(i) 367 + 272
(ii) 548 + 237
(iii) 479 + 258 + 382
(iv) £6.29 + £5.75
• Write the missing numbers in this calculation:
£10.64 = £4.8 + £.7

In-depth Investigation
Use Whole Class Activity from Day 1.

### Extra Support

Expanded Sums
Using expanded column addition to add pairs of 3-digit numbers (one ‘carry’)