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Grade 2 · lesson 4 of 4

Combine and Compare Category Records

Use only the stated category counts.

About 15 minutes, plus any extended practice

Download the grade pack

Supplied materials

  • Paper and a pencil; drawing and spoken explanations are welcome. An adult may read directions and options aloud.
  • Supplied worked-case record: Votes are swim 9, run 6, cycle 4.
  • All quantities and shape descriptions are supplied in the worked example and questions; no purchase or personal information is needed.

Learn the idea

A category display can support more than one calculation. To combine named categories, add their counts. To compare, subtract smaller from larger. Keep the response group and survey scope explicit; a small supplied sample does not describe everybody outside that record.

Use only the stated category counts. Identify whether the prompt asks for a total or a difference, calculate it, and label the result as responses in this record. Check with matching marks or a joined bar.

A difference and a combined count answer different questions. Do not extend a small fictional record to everybody’s preferences. Copy the labels and counts before choosing the two groups to compare.

  1. Copy the labels and counts before choosing the two groups to compare.
  2. Follow the worked example. Point to each number or shape feature and say what it tells you.
  3. Use only the stated category counts.
  4. Try the question and then the three practice questions. Check your answers and explain any change you make.
Worked example

See the method in action

Votes are swim 9, run 6, cycle 4. Swim and cycle together have 13 votes. Swim has three more than run. These statements describe the nineteen supplied votes, not a claim about every learner’s favorite sport. A difference and a combined count answer different questions. Do not extend a small fictional record to everybody’s preferences. Copy the labels and counts before choosing the two groups to compare.

Your turn

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.

Helpful tips
  • A difference and a combined count answer different questions.
  • Do not extend a small fictional record to everybody’s preferences.
A record has walk 7, bus 4, and bike 3 responses. How many more walk than bus responses are recorded?

Feedback appears here after you check. This is practice, not a graded school assessment.

See the answer and explanation

3

A comparison uses subtraction, and applies only to this supplied record. The result is 3.

Take it further

For red 8, green 5, blue 6 responses, red plus blue is 14 and red minus green is 3.

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.

More practice: try new cases

Choose an answer for each problem. Explain your method on paper, then use the feedback to decide what to revisit.

More practice: try new cases
1. A record has walk 8, bus 5, and bike 3 responses. How many more walk than bus responses are recorded?
Need a hint?
  • A difference and a combined count answer different questions.
  • Do not extend a small fictional record to everybody’s preferences.
2. A record has walk 9, bus 6, and bike 3 responses. How many more walk than bus responses are recorded?
Need a hint?
  • A difference and a combined count answer different questions.
  • Do not extend a small fictional record to everybody’s preferences.
3. A record has walk 10, bus 7, and bike 3 responses. How many more walk than bus responses are recorded?
Need a hint?
  • A difference and a combined count answer different questions.
  • Do not extend a small fictional record to everybody’s preferences.

Your choices are temporary. Feedback appears after you check all the answers.

Nothing here is saved to an account or sent to a teacher. Keep your own notes or download them before leaving. The score describes these questions; it does not certify subject mastery.

Check the subject sources

These LifeStarter passages, scenarios and exercises are authored for this Academy with AI assistance and review. External resources keep their publishers’ terms. A grade label suggests a starting level; it does not establish alignment with your school’s complete requirements.