Steply

Calculate 10 = 2 + □

Step by step, with the reason for every step · Make 10 · Elementary

Step by step

The question

Question: 10 = 2 + □.

What number goes in the box?

10 = 2 + □

1 Show 2

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

8 blue dots fill the frame.

So 2 and 8 make 10.

10 = 2 + 8

4 Check

We count all the dots.

We start at 2 and count on.

3, 4, 5, 6, 7, 8, 9, 10.

Yes!

It works.

2, 3, 4, 5, 6, 7, 8, 9, 10

Let's look back.

First: show 2.

Then: fill the empty boxes.

Then: write the number.

Last: check.

Answer
10 = 2 + 8

Your turn

Try this one yourself, then check:

10 = 8 + □
Show the answer
2

More from Make 10

The whole lesson: Make 10 →