01 / Number Studio

What changes when eight and five become ten and three?

Move counters, follow the equation and keep the total constant.

Learning purpose

Recognise a complete ten while preserving the total in addition.

Number Studio / Make a ten13 counters. One total.

First quantity: 8Second quantity: 5

8 + 5 = 13

Start with 8 in the first quantity and 5 in the second. There are 13 altogether.

Start with eight and five: thirteen counters.

Split five into two and three. Move two to the eight to make ten.

Ten and three make thirteen. The total has stayed the same.

Worked example / Readable without the model

Keep the relationship in view.

8 + 5 = 8 + 2 + 3 = 10 + 3 = 13. Move two counters, without adding or removing any.

Prepare for the exploration.

Begin with the stated example. Connect the controls to the representation and explanation; ask what changed and what stayed the same.

Use the representation thoughtfully.

The model is an explanatory aid. It does not assess a learner or establish that a teaching approach will suit every situation.

Connected to practice.

The mathematical activity relates to the documented themes of early mathematics and teacher support. It is a new website explanation, not a previously published tool attributed to Dr Sako.

Explore the relevant professional work