# Maths Year 2 Spring Addition and Subtraction

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

## Use facts, patterns, PV to add/subtract(suggested as 3 days)

### Planning and Activities

Day 1 Teaching
Use cards on the Interactive Whiteboard to form: 6 + 5 + 3 + 5 + 4 = [ ]. We can change the order to make it easier. Children discuss with a partner. Take feedback, drawing out pairs that make 10. Move cards round to show:
5 + 5 + 6 + 4 + 3 = [ ], then rewrite as:
10 + 10 + 3 = [ ], then with the answer:
10 + 10 + 3 = 23. It was easy. We just used pairs to 10 and place value! Repeat with other similar additions.
Group Activities
-- Pick five or more 1–10 number cards to add; identify pairs to 10, doubles, and number facts to help add them.
-- Roll three or more dice and identify pairs to 10, doubles, and number facts to help add.

Day 2 Teaching
Write: 7 + 7, 10 + 6, 9 + 3, 6 + 4, 15 + 5, 4 + 7, 18 + 5, 20 + 7. Discuss how some can be solved using place value, putting 10s and 1s together, like 10 + 6. Some use number facts. Some use counting on. Sort into two groups: 1) counting on; 2) place value/ number facts. See important note on teaching/ activities document.
Group Activities
Use the ‘Cross Additions’ in-depth problem-solving investigation below as today’s group activity.
Or, use this activity:
-- Sort and solve additions according to how they might best be solved (counting on, place value or number facts).

Day 3 Teaching
Write: 26 – 6, 30 – 7, 13 – 4, 20 – 8, 9 – 2, 14 – 4, 23 – 7. Discuss and sort into groups: those best worked out by counting back, and those most efficiently solved using place value/number facts.
Group Activities
-- Sort and solve subtractions according to how they might best be solved (counting back, place value or number facts).

### You Will Need

• Number cards or text boxes on the Interactive Whiteboard
• 1–10 number cards (enough for each pair)
• 1–10 or 0-9 dice
• Coloured whiteboard pens
• Place Value cards
• ‘Using number facts and place value for addition’ sheet (see resources)
• Two hoops
• 0–100 beaded lines (see resources)
• Number cards (see resources)
• ‘Using number facts and place value for subtraction’ sheet (see resources)

### Mental/Oral Maths Starters

Day 1
Pairs to 10 (pre-requisite skills)

Suggested for Day 2
Pairs to 20 (simmering skills)

Suggested for Day 3
Saying 1 or 2 more than a 2-digit number (simmering skills)

### Worksheets

Day 1
Look for known number facts to help efficiently add a series of single-digit numbers.

Day 2
Code a series of additions according to how they might best be solved (counting on, place value or number facts).

Day 3
Code a series of subtractions according to how they might best be solved (counting back, place value or number facts).

### Mastery: Reasoning and Problem-Solving

• Write an addition of five different numbers, all less than 10, with a total of 28.
• Which one number less than 10 fits the gaps?
6 + ☐ + 7 + ☐ + ☐ = 25
• Solve each of these additions using a different method. Say how you did each one.
30 + 9 =
17 + 5 =
4 + 7 + 6 =
• Solve each of these subtractions using a different method. Say how you did each one.
25 – 5 =
14 – 6 =
58 – 4 =