Step by step
The question
Question: count back by 2s from 20 to 10.
Count back by 2s from 20 to 10
1 Start at 20
Here is a number line.
2 Jump by 2s
Each jump is 2 less.
We say the number where we land.
3 Write the numbers
Now we write them in a row.
We stop at 10.
= 20, 18, 16, 14, 12, 10
4 Check
Look at the ones digits: 0, 8, 6, 4, 2, then again.
They make a pattern.
Yes!
It works.
ones: 0, 8, 6, 4, 2, 0
Let's look back.
First: start at 20.
Then: jump by 2s.
Then: write the numbers.
Last: check.
Answer
= 20, 18, 16, 14, 12, 10