Answer Key — 3.OA.B.5

For parents and tutors

Do not share with students before practice tests.

Practice Problems — Sets 1–10

| Set | Guidance | | --- | --- | | Set 1 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 2 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 3 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 4 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 5 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 6 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 7 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 8 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 9 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 10 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. |

Practice Problems — Sets 11–20

| Set | Guidance | | --- | --- | | Set 11 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 12 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 13 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 14 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 15 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 16 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 17 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 18 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 19 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. | | Set 20 | Apply properties of operations as strategies to multiply and divide — verify written work and accept reasonable drawings. |

Review tiers 1–10

• Checklists are parent-judged.
• Written items: verify against practice set patterns.
• Standard text: Apply properties of operations as strategies to multiply and divide.2 Examples: If 6 _ 4 = 24 is known, then 4 _ 6 = 24 is also known. (Commutative property of multiplication.) 3 _ 5 _ 2 can be found by 3 _ 5 = 15, then 15 _ 2 = 30, or by 5 _ 2 = 10, then 3 _ 10 = 30. (Associative property of multiplication.) Knowing that 8 _ 5 = 40 and 8 _ 2 = 16, one can find 8 _ 7 as 8 _ (5 + 2) = (8 _ 5) + (8 _ 2) = 40 + 16 = 56. (Distributive property.)

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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