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What comes after 19

Step by step, with the reason for every step · Before, after, between · Elementary

Step by step

The question

Question: what comes after 19?

What comes after 19?

We write it in numbers.

The box is the number we want.

= 19, □

1 Find 19

Here is a number line.

2 Go one step right

We land on 20.

3 Write the number

So after 19 comes 20.

= 19, 20

Careful!

After 9 ones, the ones start again at 0.

The tens go up by 1.

Careful: 19 → 20: the ones start again at 0

4 Check

We check it the other way.

Before 20 comes 19.

Yes!

It works.

Before 20 comes 19

Let's look back.

First: find 19.

Then: go one step right.

Then: write the number.

Last: check.

Answer
= 19, 20

Your turn

Try this one yourself, then check:

What comes after 29?
Show the answer
30

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