Count by 10s (189)

Teaching Notes

Introduce skip counting by 10s using a 100 chart, base ten blocks, or bundles of ten sticks. Emphasize that only the tens digit changes as you count.

Vocabulary

Skip counting: Counting by a given number.

Tens: Groups of ten.

Sequence: Numbers in a specific order.

Common Mistakes

• Forgetting to count in groups of ten instead of ones.
• Confusing counting by 10s with counting by 1s or 5s.
• Errors when transitioning to a new decade (e.g., 90 to 100).

Differentiation

Discussion Questions

• What pattern do you notice in the numbers when you count by 10s?
• How does knowing how to count by 10s help you count faster or understand larger numbers?
• Can you think of a real-life situation where counting by 10s would be useful?

Extension Activities

• Count by 10s on a number line.
• Use base-ten blocks.
• Skip count forwards and backwards.

Parent Tip

Count groups of 10 items, like fingers and toes.

Skill Cluster

Number Sense & Place Value

Estimated Time

15 minutes

Skills Practiced

Prerequisites

• Count to 100 by 1s
• Recognize numbers 1-100
• Understand basic number order

Next Steps

• Count by 5s to 100
• Count by 2s to 100
• Add and subtract multiples of 10