Calculate 10 = 9 + □

Step by step

The question

Question: 10 = 9 + □.

What number goes in the box?

1 Show 9

A ten frame has 10 boxes.

2 Fill the empty boxes

How many boxes are empty?

We fill them with blue dots.

We count them.

3 Write the number

1 blue dots fill the frame.

So 9 and 1 make 10.

4 Check

We count all the dots.

We start at 9 and count on.

10.

Yes!

It works.

Let's look back.

First: show 9.

Then: fill the empty boxes.

Then: write the number.

Last: check.