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Lesson 1-1.01.2

Grouping by 5s and 10s

Learn how grouping objects into sets of 5 and 10 makes counting easier and more organized.

Grade 1Unit 1Week 1Day 2Visual-First LessonDaily Assignment
Lesson progress: 0%
Learning Goal

I can group objects in sets of 5 and 10.

By the end of today's lesson, you should be able to organize objects into equal groups of 5 or 10 and use those groups to count more efficiently.

What you will learnMake groups of 5 and 10 to organize and count objects.
What success looks likeYou make equal groups and use the groups to find the total accurately.
Explain the Concept

Grouping helps us see and count objects more easily.

Instead of looking at many separate objects, we can organize them into equal groups. A group of 5 has exactly five objects. A group of 10 has exactly ten objects. Once objects are grouped, we can count the groups and find the total.

Two groups of 5 make 10.
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5 + 5 = 10. We can see two equal groups of 5.

Grouping tip: Move objects into small, equal sets. Check each group before you count the total.
Worked Examples

Watch how we group and count.

Example 1 — Make groups of 5

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Start with 10 objects.

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Place 5 objects in the first group and 5 objects in the second group.

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There are 2 groups of 5, so there are 10 objects altogether.

Example 2 — Make groups of 10

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Start with 20 objects.

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Put 10 objects in one group and 10 objects in another group.

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There are 2 groups of 10, so there are 20 objects altogether.

Guided Practice

Try it with help.

Choose an answer. You will get immediate feedback.

10 counters are placed into groups of 5. How many groups?

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Which number tells how many objects belong in a group of 10?
Independent Practice

Now group on your own.

15 objects are arranged in groups of 5. How many groups are there?
20 objects are arranged in groups of 10. How many groups are there?
Graded Daily Assignment

Show what you learned.

This score contributes to your Grade 1 progress record. You may use up to three attempts; the highest score is kept.

ATTEMPTS0 of 3Best score: —

1. If you have 10 objects and put 5 objects in each group, how many groups do you make?

   

2. How many objects belong in one group of 5?

   

3. Which picture shows two groups of 5?



4. There are 20 crayons. You make groups of 10. How many groups do you have?

   

5. Why can grouping objects help you count?



Attempt History

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