Answer Key — 1.OA.A.1

For parents and tutors

Do not share with students before practice tests.

Practice Problems — Sets 1–10

| Set | Guidance | | --- | --- | | Set 1 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 2 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 3 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 4 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 5 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 6 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 7 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 8 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 9 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 10 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. |

Practice Problems — Sets 11–20

| Set | Guidance | | --- | --- | | Set 11 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 12 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 13 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 14 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 15 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 16 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 17 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 18 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 19 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. | | Set 20 | Use addition and subtraction within 20 to solve word problems involvi… — verify written work and accept reasonable drawings. |

Review tiers 1–10

Checklists are parent-judged.
Written items: verify against practice set patterns.
Standard text: Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.1

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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