Watch: Counting in threes
Repeated addition
Here are some dice.
What do you notice about these dice?
You may have noticed that there are 4 dice and they all show the number 3.
What is 3 + 3 + 3 + 3?
There is more than one way to find the right answer.
You could double the first two, then double them again.Or you could count up in 3s.
Did you get the answer 12?
Using cubes
Here are some cubes.
Can you see a pattern?
1 of 4
The numbers are increasing.
3, 6, 9, 12
The numbers are increasing by 3 each time.
3 + 3 + 3 + 3 = 12
Using arrays
Here is an array.
We can count in 3s from top to bottom.
Or from left to right.
Counting on a numberline
This is what counting up in 3s looks like on a number line.
Can you see a pattern? What do you notice?
Counting on hands
Here is another way to count in 3s.
Put your hands out in front of you, palms facing up.
Starting with your left thumb, count up in 3s.
After 30 what are the next 3 multiples of 3?
Let鈥檚 count in 3s:
3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39
Can you continue the pattern?
How far can you go?
Can you count back in 3s from 30?
Activities
Activity 1
Try out your new counting skills with this word problem.
Kylie the kangaroo jumps in 3s on a numberline. She starts at 0 and jumps 16 times.
- After 5 jumps, what number does Kylie land on?
- After 10 jumps, what number does Kylie land on?
- After 16 jumps what number does Kylie land on?
- How did you work it out?
Did you count up in 3s? Did you use multiples of 3 to help you? Did you use any times table knowledge to help you answer this question?
The answer is 48.
Quiz
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More on Multiplying and dividing
Find out more by working through a topic
- count9 of 36
- count10 of 36
- count11 of 36
- count12 of 36