Answer Key — 5.NBT.A.2

For parents and tutors

Do not share with students before practice tests.

Practice Problems — Sets 1–10

| Set | Guidance | | --- | --- | | Set 1 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 2 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 3 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 4 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 5 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 6 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 7 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 8 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 9 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 10 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. |

Practice Problems — Sets 11–20

| Set | Guidance | | --- | --- | | Set 11 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 12 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 13 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 14 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 15 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 16 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 17 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 18 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 19 | Explain patterns in the number of zeros of the product when multiplyi… — verify written work and accept reasonable drawings. | | Set 20 | Explain patterns in the number of zeros of the product when multiplyi… — 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 patterns in the number of zeros of the product when multiplying a number by powers of 10, and explain patterns in the placement of the decimal point when a decimal is multiplied or divided by a power of 10. Use whole-number exponents to denote powers of 10.

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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