K-5 friendly lesson
One small step at a time.Read the idea, try the activity, and celebrate each win as you go.
Ten More or Less
➕➖ Ten more or ten less changes only the tens place. The ones digit stays the same.
Do this: Read the concept below, then try the quiz or activity.
Lesson 129 of 180
Concept
Think on a hundred chart: • Move down one row = 10 more • Move up one row = 10 less
Examples: • 34 -> 44 (ten more) • 34 -> 24 (ten less) • 70 -> 80 (ten more) • 70 -> 60 (ten less)
Try it
Find ten more and ten less: 1. 25 2. 41 3. 68 4. 90 5. 13
Challenge: 6. A number has 10 more = 57. What is the number?