1. Count Equal Groups MAFS.3.OA.1.1

2. How many tires does each car have?

3. 4 4 4 4

4. Each car represents a GROUP of 4 tires. 4 4 4 4

5. Since each group is EQUAL, we can COUNT EQUAL GROUPS by skip counting. 4 4 4 4 We can skip count to find how many tires there are in all.

6. Let’s skip count by 4s to find how many tires in all. 4 4 4 4 4,8,12,16 +4

7. 4 4 4 4 4,8,12,16 There are 16 tires in all. Let’s skip count by 4s to find how many tires in all.

8. 4 4 4 4 4,8,12,16 So, 4 equal groups of 4 tires is 16 tires. There are 16 tires in all.

9. How many arms does each student have?

10. 22222

11. Each student represents a GROUP of 2 arms. 22222

12. Since each group is EQUAL, we can COUNT EQUAL GROUPS by skip counting. 22222 We can skip count to find how many arms there are in all.

13. Since each group is EQUAL, we can COUNT EQUAL GROUPS by skip counting. 22222 We can skip count to find how many arms there are in all. 2, 4, 6, 8,10

14. Since each group is EQUAL, we can COUNT EQUAL GROUPS by skip counting. 22222 There are 10 arms in all. 2, 4, 6, 8,10

15. So, 5 equal groups of 2 arms is 10 arms in all. 22222 There are 10 arms in all. 2, 4, 6, 8,10

16. How many crayons are in each pack?

17. 33 34

18. 33 34 Are these packs of crayons EQUAL GROUPS?

19. How many crayons are in each pack? 33 34 Are these packs of crayons EQUAL GROUPS? NO

20. 33 34 Can we find out how many crayons there are in all?

21. 33 34 Are these packs of crayons EQUAL GROUPS? NO Can we find out how many crayons there are in all? YES

22. 33 34 Are these packs of crayons EQUAL GROUPS? NO Can we find out how many crayons there are in all? YES But we won’t skip count because we don’t have EQUAL GROUPS.

23. 33 34 Are these packs of crayons EQUAL GROUPS? NO Can we find out how many crayons there are in all? YES But we won’t skip count because we don’t have EQUAL GROUPS. + + + = 13 crayons in all

24. Are there EQUAL GROUPS of bicycle wheels?

25. YES There are 8 equal groups of bicycle wheels.

26. Are there EQUAL GROUPS of bicycle wheels? YES So, we can skip count to find how many bicycle wheels there are in all. There are 8 equal groups of bicycle wheels.

27. Are there EQUAL GROUPS of bicycle wheels? YES There are 16 bicycle wheels in all. 2 4 6 8 10 12 14 16 There are 8 equal groups of bicycle wheels.

28. So, 8 equal groups of 2 bicycle wheels is 16 bicycle wheels in all. There are 16 bicycle wheels in all. 2 4 6 8 10 12 14 16 There are 8 equal groups of bicycle wheels.

29. Take out 12 counters.

30. Put them into EQUAL GROUPS of 2.

31. 2 + 2 + 2 + 2 + 2 + 2 = 12 6 twos is 12 6 groups of 2 is 12

32. Take out 12 counters.

33. Put them into EQUAL GROUPS of 4.

34. 4 + 4 + 4 = 12 3 fours is 12 3 groups of 4 is 12

35. Wrap-Up How can you count equal groups efficiently? How can you find out how many 4 groups of 3 is?

36. Bonus Questions 1.Renee has 4 packages of Twinkies. There are 2 Twinkies in each package. How many Twinkies does she have altogether? This is 1 package of Twinkies. Are there EQUAL GROUPS of Twinkies? How can I find out how many Twinkies are there? 2, 4, 6, 8. There are 8 Twinkies in all. OR 2+2+2+2=8. There are 8 Twinkies in all

37. Bonus Questions 2. What is 5 groups of 3? 3, 6, 9, 12, 15. 5 groups of 3 is 15. 5 threes is 15.