K-5 friendly lesson
One small step at a time.Read the idea, try the activity, and celebrate each win as you go.
Place value models - tens and ones
Numbers have a secret code! π΅οΈββοΈ Letβs be detectives and use blocks to understand the difference between tens and ones. Itβs all about location, location, location!
Do this: Read the concept below, then try the quiz or activity.
Lesson 36 of 186
Concept
Place value tells us the value of a digit based on its position in a number. In a two-digit number, we have a 'tens' place and a 'ones' place.
Visual: Let's look at the number 23. * We can model this with place value blocks. We use rods for tens and small cubes for ones. * For the number 23, we would have 2 rods (because the digit 2 is in the tens place, representing 20) and 3 small cubes (because the digit 3 is in the ones place, representing 3). * So, 23 is made of 2 tens and 3 ones.
Key Idea: The digit on the left is the 'tens' place and is worth that many groups of 10. The digit on the right is the 'ones' place and is worth that many single units. The position of the digit changes its value!
Try it
Practice: Place value models - tens and ones.