Answer Key — 6.NS.B.4

For parents and tutors

Do not share with students before practice tests.

Practice Problems — Sets 1–10

| Set | Guidance | | --- | --- | | Set 1 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 2 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 3 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 4 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 5 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 6 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 7 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 8 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 9 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 10 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. |

Practice Problems — Sets 11–20

| Set | Guidance | | --- | --- | | Set 11 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 12 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 13 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 14 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 15 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 16 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 17 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 18 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 19 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. | | Set 20 | Find the greatest common factor of two whole numbers less than or equ… — verify written work and accept reasonable drawings. |

Review tiers 1–10

Checklists are parent-judged.
Written items: verify against practice set patterns.
Standard text: Find the greatest common factor of two whole numbers less than or equal to 100 and the least common multiple of two whole numbers less than or equal to 12. Use the distributive property to express a sum of two whole numbers 1-100 with a common factor as a multiple of a sum of two whole numbers with no common factor. For example, express 36 + 8 as 4 (9 + 2)..

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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