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Count by 2s from 11 to 25

Step by step, with the reason for every step · Count by 2s, 5s, 10s · Elementary

Step by step

The question

Question: count by 2s from 11 to 25.

Count by 2s from 11 to 25

1 Start at 11

Here is a number line.

2 Jump by 2s

Each jump is 2 more.

We say the number where we land.

3 Write the numbers

Now we write them in a row.

We stop at 25.

= 11, 13, 15, 17, 19, 21, 23, 25

4 Check

Look at the ones digits: 1, 3, 5, 7, 9, then again.

They make a pattern.

Yes!

It works.

ones: 1, 3, 5, 7, 9, 1, 3, 5

Let's look back.

First: start at 11.

Then: jump by 2s.

Then: write the numbers.

Last: check.

Answer
= 11, 13, 15, 17, 19, 21, 23, 25

Your turn

Try this one yourself, then check:

Count by 2s from 15 to 27
Show the answer
15, 17, 19, 21, 23, 25, 27

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