## The emerging science of the brain shows that mathematical thinking centrally involves visual pathways – and finger representations are important to consider. Utilizing fingers and other concrete ways to solve problems adds meaning to numbers. Strong mathematics learners are those who think deeply, make connections and *visualize* problems

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## Here are nine triangles. Each one has three numbers on it.

## Your challenge is to arrange these triangles to make one big triangle, so the numbers that touch add up to 10.

## You can print out a copy and cut them out, then try arranging them.

If you prefer, I have included a printable version of the triangles with the numbers represented on tens frames.

## Talk about how you will go about trying to make the big triangle.

How will you get started?

What will you do next?

### ONE BIG TRIANGLE pdf

### OneBigTriangle10Frames

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**If you have ten counters numbered 1 to 10, how many can you put them into pairs that add to 10?**

*It might help to have counters numbered from 1 – 10 as well as number lines to do this problem.*

## Can you use them all?

How did you get your answer?

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