Short Blocks

# Maths Year 2 Spring Multiplication and Division (B)

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

## Multiply by 2, 5 and 10(suggested as 2 days)

### Planning and Activities

Day 1 Teaching
Display a 0–50 beaded line (see resources) on the Interactive Whiteboard. Write 4 × 5 =  on the board. This is 4 lots of 5, or 4 times 5. Children ring groups of 5 beads until they have 4 groups. Say that this is 4 lots of 5 beads. Count in 5s to show that 4 × 5 = 20. Repeat with 3 × 5, 6 × 5, 10 × 5.
Group Activities
-- Generate and solve times 5 multiplication sentences with dice, using hops on beaded lines or fingers.
-- Solve and create word problems for multiplication by 5.

Day 2 Teaching
Display a 0–30 beaded line on the Interactive Whiteboard (see resources). Write 4 × 2 =  on the board. We can read this as 4 lots of 2, or 4 times 2. Ask children to ring groups of 2 beads, until they have ringed 4 groups (4 lots of 2 beads). Count in 2s to show that 4 × 2 = 8. Repeat with 8 × 2, 3 × 10, 5 × 5.
Group Activities
Use the in-depth problem-solving investigation ‘Odd Times Even’ from NRICH as today’s group activity.
Or, use these activities:
-- Generate and solve times 2, times 5 and times 10 multiplication sentences, using hops on beaded lines or fingers.
-- Solve and create word problems for multiplication by 2, 5 and 10.

### You Will Need

• 0–50 beaded line (see resources)
• 1–10 dice
• ‘Multiplying by 5 using beaded lines’ sheet (see resources)
• 0–30 beaded line (see resources)
• Spinners (see resources)
• ‘Multiplying by 2, 5 and 10 using beaded lines’ sheet (see resources)

### Mental/Oral Maths Starters

Day 1
Count in 10s and 5s (pre-requisite skills)

Day 2
Count in 2s (pre-requisite skills)

### Worksheets

Day 1
Complete multiplication sentences (times 5) using beaded lines, counting on fingers, or counting in heads.

Day 2
Complete multiplication sentences (times 2, times 5 and times 10) using beaded lines, counting on fingers, or counting in heads.

### Mastery: Reasoning and Problem-Solving

• Write the missing numbers.
6, 8, ☐ , ☐ , 14, 16, ☐
25, 30, ☐ , ☐ , ☐ , 50
80, 70, 60, ☐ , ☐ , ☐
• What are:
4 lots of 5?
9 lots of 2?
8 lots of 10?
• Sam counts in 2s from 0. What are the 5th, 6th and 7th numbers he says?
• Gill counts in 5s from 0. What are the 6th, 7th and 8th numbers she says?
• Complete these multiplications.
8 × 5 =
7 × 2 =
4 × 10 =
11 × 2 =

In-depth Investigation: Odd Times Even
Try multiplying any odd and even number together. Use different models to show this. Can children make any observations or generalisation about what happens when you multiply an odd and an even number? Odd Times Even from nrich.maths.org.

### Extra Support

Clever Twos
Carrying out early multiplication (in 2s)