HUNTERTUTORING

Study Guide — K.NBT.A.1

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Teen numbers as 10 and ones

Teen numbers are a ten and some ones — use ten-frames and bundles.

What this standard means

  • Show 11–19 as one ten and extra ones
  • Compose teen numbers with objects or drawings
  • Decompose a teen number into 10 + ones
  • Record with equation (e.g. 15 = 10 + 5)

_See printable PDF for diagram._

How to use the 20 practice sets

| Sets | When to use | | --- | --- | | 1–5 | Intro — explore together, short written items | | 6–10 | Core skills — diagrams and written practice | | 11–15 | Mixed review — explain thinking | | 16–20 | Stretch — word problems and mastery tasks |

Pacing: 10–15 minutes per session.

How to practice

1. Fill one full ten-frame plus extras 2. Bundle 10 craft sticks with a rubber band 3. Say “14 is ten and four”

_See printable PDF for diagram._

Common mistakes

  • Reading 15 as “one-five”
  • Not seeing the hidden 10 in teens
  • Counting all ones without grouping ten

Review and practice tests

1. Start Review 1/10 when sets 1–3 feel comfortable. 2. Move up one review level with little help. 3. Use Practice Test 4/10–6/10 for mid-standard checks. 4. Practice Test 10/10 is the mastery bar for K.NBT.A.1.

  • [ ] Models any teen number 11–19
  • [ ] Writes 10 + ones equation
  • [ ] Explains in words

Materials for this standard

  • Practice Problems — 20 printable sets
  • Review — 10 difficulty levels
  • Practice Test — 10 difficulty levels
  • Answer key — for parents and tutors

For your personal study only. Copying, printing, screenshotting, or sharing this material is not permitted and may result in loss of access.

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