Answer Key — 4.NF.A.1

For parents and tutors

Do not share with students before practice tests.

Practice Problems — Sets 1–10

| Set | Guidance | | --- | --- | | Set 1 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 2 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 3 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 4 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 5 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 6 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 7 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 8 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 9 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 10 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. |

Practice Problems — Sets 11–20

| Set | Guidance | | --- | --- | | Set 11 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 12 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 13 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 14 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 15 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 16 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 17 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 18 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 19 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. | | Set 20 | Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b… — verify written work and accept reasonable drawings. |

Review tiers 1–10

Checklists are parent-judged.
Written items: verify against practice set patterns.
Standard text: Explain why a fraction a/b is equivalent to a fraction (n × a)/(n × b) by using visual fraction models, with attention to how the number and size of the parts differ even though the two fractions themselves are the same size. Use this principle to recognize and generate equivalent fractions.

Practice test scoring

| Tier | Pass guidance | | --- | --- | | 1–3 | Most oral tasks smooth; majority of written correct | | 4–6 | 7/10+ total with clear understanding | | 7–8 | 9/12+ with explanations | | 9–10 | Near-perfect; ready to move on |

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