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Grade 2 · unit review

Review: Equal Groups and Changing Totals

Use pairs and equal rows to organize counts and solve a two-step story.

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Bring the unit skills together

Use these 4 new cases to check your reasoning. Choices are temporary and are not saved to an account, sent to staff or recorded as school grades. Download your current review choices before leaving or reloading.

Unit review questions
1. Four rows have four dots each. How many dots are there?
2. Nineteen counters are paired. What happens?
3. Five rows of four dots are split into two rows and three rows. Which sum counts all dots?
4. Three rows hold three badges each. Two badges are removed. How many remain?

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

Plan a pretend badge display of four rows with four badges in each. Write its total as repeated addition. Split it into one row and three rows and show the two subtotals. Explain whether the total can be paired evenly. Finally remove three badges and find how many remain.

Work on paper or in your own document. Explain the choices you made.

  • Draw or describe four equal rows of four and total 16.
  • Show split subtotals 4 and 12, with 4 + 12 = 16.
  • Describe eight pairs with no leftovers, so 16 is even.
  • Subtract three badges to find 13 remaining.
Compare with a model response

4 + 4 + 4 + 4 = 16 badges. One row has 4 and three rows have 12, so 4 + 12 = 16. Sixteen makes eight pairs without leftovers and is even. After three leave, 16 − 3 = 13 badges remain.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.