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Third/Skip Counting

Count Backwards by 2s

Count backwards by 2s from 20 — early subtraction thinking.
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Study Guide

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Teacher Resources
Lesson Plan

Patterns in Counting Backwards

Standards
2.NBT.A.2
Printable Aids
Number LineHundreds Chart
Teaching Notes

Introduce counting backwards by 2s as a repeated subtraction pattern. Use a number line or physical objects to demonstrate the concept, emphasizing the 'every other number' pattern. This skill builds number sense and prepares students for subtraction.

Vocabulary
Backwards counting: Counting down from a number.
Subtract: Take away a number.
Common Mistakes
  • Skipping numbers incorrectly (e.g., counting by 1s or 3s instead of 2s)
  • Stopping prematurely (e.g., at 2 instead of 0)
  • Counting forward instead of backward
Differentiation
SupportProvide a number line or hundreds chart and have students point to each number as they count. Use manipulatives to physically remove two objects at a time. Practice counting aloud together.
ChallengeChallenge students to count backwards by 2s from a larger number (e.g., 50 or 100). Introduce counting backwards by 3s or 5s. Ask them to explain the pattern they observe.
Discussion Questions
  • What pattern do you notice when counting backwards by 2s?
  • How is counting backwards by 2s similar to counting forwards by 2s?
  • Why is it important to learn how to count backwards?
Extension Activities
  • Count backwards by 2s to 0.
  • Use a number line to jump back.
  • Find even numbers.
Parent Tip

Count backwards from 20 by 2s, clapping for each number.

Learning Path
Skill Cluster

Number Sense & Operations

Grade Level

1-2

Skills Practiced
Skip counting backwards by 2Subtraction within 20