In the past few lessons, you learned that multiplication is repeated addition and the opposite of division.
Multiplication is so useful that in this lesson you're going to refresh your multiplication skills for the numbers 0 to 5.
Multiplying any number by 0 equals 0.
Take a look:
0 × 3 = 0
If we have 0 groups of 3 items, we have 0 items!
Any number times 0 equals 0.
0 × 7 = 0
Any number times 1 is the number itself.
1 × 4 = 4
Can you find the answer to this multiplication?
1 × 2 = ?
Very good! The product is 2.
1 × 2 = 2
Multiplying any number by 2 means doubling that number, or adding that number to itself.
Take a look.
2 × 3 = 3 + 3 = 6
Tip: You can also multiply by 2 using skip counting by 2's.
Let's try it:
2 × 5 = ?
To find the sum, we can skip count by 2 five times.
2, 4, 6, 8, 10
Very good. You can also skip count by 5 twice.
2 × 5 = 10
To multiply a number by 3, skip count by that number 3 times.
3 × 4 = ?
This means:
Let's skip count 3 times:
4, 8, 12
Let's check if we get the same answer with skip counting as with addition:
3 × 4 = 4 + 4 + 4 = 12
Yes!
Let's try one more.
3 × 8 = ?
You can skip count by 3 eight times...
...or you can skip count by 8 three times.
Either way, you get:
3 × 8 = 24
Awesome!
Take a look:
4 × 5 = ?
To multiply a number by 4, we can double it twice (multiply it by 2 and 2 again).
Let's try it.
First, multiply 5 by 2.
2 × 5 = 5 + 5 = 10
Then, multiply this answer by 2 again.
2 × 10 = 10 + 10 = 20
So,
4 × 5 = 20
There you go. 🤗 You just multiplied 5 by 4.
Can you find the answer to this multiplication:
4 × 6 = ?
First, let's double the 6.
2 × 6 = 12
Now, let's double the 12.
2 × 12 = 12 + 12 = 24
So,
4 × 6 = 24
Great job! 👏
To multiply a number by 5, just skip count by 5 that many times.
5 × 6 = ?
Let's try it.
5 × 6 = 30
Great work! 👏
Let's try one more example.
5 × 9 = ?
You can skip count by 5's nine times to find the product.
5 × 9 = 45
Way to go.
The 0 to 5 multiplication tables (called 'Times Tables') are below.
Your goal is to have all of these memorized. ⚡️
Start the practice below to help you ace this skill.