Read 'Correct Answer' as 'Gateway to Dialogue': A Morning Where a Single Matchstick Brought Grandfather and Grandchild to the Same Eye Level

I was thinking about what to do on the day I would spend with my grandchild.

Teach them schoolwork.
Read a book.
Go shopping.
Play outside.

None of these are bad. However, if possible, I wanted something that both of us could enjoy with the same level of enthusiasm, rather than the grandfather unilaterally teaching something.

That is why I chose matchstick puzzles.

You move just one stick that makes up a number or symbol to turn an incorrect equation into a correct one. It is a classic, so-called brain teaser.

Before starting, I thought it might be a little difficult for a third-grader.

However, once we actually started, that worry vanished in an instant.

The first problem was,

2 + 3 = 4

Move one stick,

2 + 2 = 4

to make it correct.

Up to this point, it was a practice problem.

Next, I presented,

0 + 3 = 5

to them.

Apart from the answer I had prepared, my grandchild found,

0 + 5 = 5

instead.

Furthermore,

'8-3=5'

I made it up to that point.

It wasn't just about hitting one correct answer.
He had found for himself another correct answer hidden within the problem.

At this moment, I realized the true fun of matchstick puzzles.

In school arithmetic, problems often have a predetermined answer.

However, in matchstick puzzles, finding the first correct answer doesn't necessarily mean it's over.

'Are there any others?'

The question arises.

Then, the child changes from a solver into an explorer.

We continued with more problems.

'44-8=53'
'46+11=83'
'2-33=36'
'5+4=5'
'4-70=14'
'87-48=43'
'92-6=81'

At first, we were supposed to be thinking together.

However, before I knew it, my grandson began finding the answers as soon as he saw the problems.

Ten seconds.
Another ten seconds.
Even for slightly difficult problems, twenty seconds.

While I was still surprised, he was getting them right one after another.

However, what is important here is not the speed.

Something had changed within my grandson.

He was no longer looking at the numbers just as mere numbers.

'What does this number become if I take one stick away?'
'Where can I add this one stick?'
'Can I change not just the numbers, but the plus and minus signs too?'
'Does the whole equation hold true after moving it?'

He had started to see all of these at the same time.

In other words, they were not processing it as a calculation problem, but rather perceiving the entire equation as a structure.

Previously, I thought about the number '9'.

If you take one away, what number does it turn into?
If you move one, what does it change into?
If you add one, what does it become?

If you classify the changes of a single number in this way, a simple quiz becomes a research project.

Investigate from 0 to 9, and

'Take one away'
'Move one'
'Add one'

divide them into these three categories.

Which number is the most prone to change?
Conversely, are there numbers that can hardly change at all?
Which ones change from even to odd?
What kind of rules exist for these changes?

This could even be a summer vacation independent research project.

However, for me on that day, more important than the research was my relationship with my grandchild.

The grandfather teaches the answer, and the grandchild memorizes it.

It was not that kind of hierarchical relationship.

The grandfather gets lost, too.
The grandchild thinks, too.
The grandchild finds an alternative solution that the grandfather overlooked.

In that moment, the two are no longer teacher and student.

They become two challengers sitting side-by-side in front of the same problem.

'I don't think it's there.'
'What if you move this?'
'The calculation is correct, but you can't make it with just one.'
'There are other answers, too.'

Even without forcing a conversation, the questions generate dialogue on their own.

When trying to get a child to talk about something, adults tend to bombard them with questions.

How was school?
What was fun?
Do you understand your studies?
What do you want to be in the future?

However, children are not always necessarily willing to answer.

In that sense, matchstick puzzles have a certain margin that doesn't force an answer.

The two are looking at the same thing.
They are thinking under the same conditions.
If they get it right, they rejoice together; if they get it wrong, they laugh together.

That alone allows words to emerge naturally.

Communication might not be about talking a lot.

It is about looking at the same thing and being puzzled at the same temperature.

And it is not just about adults teaching children, but about being genuinely surprised by a child's discovery.

A single stick changes one number into another.

But on this day, that one stick changed something more.

It turned brain training into play.
It turned play into research.
It turned the search for the correct answer into a search for alternative answers.
And it turned the time between grandfather and grandchild into a time for dialogue.

What should I talk about with my grandchild?

The answer was not to force a search for topics.

It was to place a single question between the two of them.

One stick and one question.

That alone is enough for a grandfather and grandchild to sit at the same level.