Sort by One Rule and Count Each Group

Supplied materials

• Paper and a pencil; drawing and spoken explanations are welcome. An adult may read directions and options aloud.
• Supplied worked-case record: The list is red, blue, red, blue, blue.
• All quantities and shape descriptions are supplied in the worked example and questions; no purchase or personal information is needed.

Learn the idea

Sorting uses a rule such as color or shape. Decide the rule before making groups, so every object has a clear place. Count each category separately. A group with many large drawings can still contain fewer objects than a group of small drawings.

Sort the supplied list into its two stated categories. Draw one mark for each item in its category, count the marks, and answer about that category’s count. Check that both groups together include every item once.

Write a label above each category. A sorting rule must stay the same while you make the groups. Make two labeled circles and place one mark per item in the matching circle.

1. Make two labeled circles and place one mark per item in the matching circle.
2. Follow the worked example. Point to each number or shape feature and say what it tells you.
3. Sort the supplied list into its two stated categories.
4. Try the question and then the three practice questions. Check your answers and explain any change you make.

Check your reasoning

Your answer is temporary and is not saved to an account. Download your current answer before leaving or reloading. Written work on paper or in another app stays in your own file.

Take it further

Sort red, blue, red, red, blue, red. Expected: red 4, blue 2, total 6.

Nothing here is saved to an account or sent to a teacher. The answer download includes your current choice and any checked feedback. It does not include choices from the separate More practice section. Download that section separately.