Multiplication
"Understand multiplication as repeated addition and equal groups."
A Today you'll learn
- Understand multiplication as repeated addition
- Understand multiplication as equal groups
- Recall multiplication facts up to 5 x 10
B Let's understand
Multiplication is a quick way of adding the same number many times. When we have equal groups of things, we can multiply instead of adding again and again. For example, 3 groups of 4 apples is the same as 4 + 4 + 4, which we write as 3 x 4.
C See it step by step
Example 1: Worked example
- 3 x 4 = 4 + 4 + 4 = 12
Example 2: Worked example
- 5 x 2 = 2 + 2 + 2 + 2 + 2 = 10
D Your turn
What is 3 x 4?
Look back at "Let's understand" above for a clue.
E Ready to practise?
Key idea 1
Multiplication means putting together equal groups.
Key idea 2
The x sign is read as "times" or "multiplied by".
Key idea 3
The answer to a multiplication is called the product.
Any number multiplied by 1 stays the same
Any number multiplied by 1 stays the same.
Any number multiplied by 0 is 0
Any number multiplied by 0 is 0.
Warm up
1. Write 4 x 3 as repeated addition.
2. 5 x 5 = ?
3. 2 x 9 = ?
Practise
4. 3 x 6 = ?
5. 4 x 4 = ?
6. There are 5 bags with 3 balls each. How many balls in total?
Challenge
7. 7 x 2 = ?
8. 1 x 8 = ?
correct
Concepts to revise
1. Write 4 x 3 as repeated addition.
3 + 3 + 3 + 3 = 12
2. 5 x 5 = ?
25
3. 2 x 9 = ?
18
4. 3 x 6 = ?
18
5. 4 x 4 = ?
16
6. There are 5 bags with 3 balls each. How many balls in total?
15 balls
7. 7 x 2 = ?
14
8. 1 x 8 = ?
8