Grouping Objects in Ones and Tens

1. Grouping Objects in Ones and Tens Number Sense: 1.0 Count and group objects in ones and tens (e.g., three groups of 10 and 4 equals 34, or 30+4

2. Our Learning ObjectiveToday we will count and group objects inones and tens. CFU: What will we do today boys and girls? What are we going to group the objects in?

3. Activate Prior Knowledge We know that numbers zero to nine have only one digit. For example: 0 1 2 3 4 5 6 7 8 9 Once we reach 10 we have two digits and we call this 10.

4. We are going to visit the website below to help us practice counting ones and tens using base 10 blocks. http://www.learningbox.com/Base10/BaseTen.html

5. Wow all the bats flew out of the cave!!!! Concept Development

6. I will need to count them all one by one to find out how many flew out, but before I do, I will follow the right steps to counting. Guided Practice

7. Steps Step one: Count ten bats. Step two: Draw a circle around the group of ten bats. Step three: Keep making groups of ten until you only ones left. Step four: Write the number of the group of tens in the tens column and the number of ones left over in the ones column. Step five: Write your number on the line. The number you write is the number of bats that flew out of the cave.

8. I will need to count them in order to find out how many flew out. I will make groups of tens first and then count the ones left over. Skill Development

9. Let’s find out if we counted correctly. 15 2 3 1 4 21 16 6 20 8 5 7 14 23 18 10 12 9 17 22 24 19 13 11 Skill Development

10. I counted 24 bats The number 24 has 2 groups of ten and 4 ones. Guided Practice

11. Guided Practice 1

12. Guided Practice 2

13. Guided Practice 3

14. Importance It is important to know how to group object in tens and ones because it helps us count correctly and helps us understand place value.

15. Non-Example Counting five bats, is not an example of counting tens and ones since you are only counting ones. 1 2 3 4 5

16. Name:_____________________Independent Practice 1 Steps Step one: Count ten bats. Step two: Draw a circle around the group of ten bats. Step three: Keep making groups of ten until you only ones left. Step four: Write the number of the group of tens in the tens column and the number of ones left over in the ones column. Step five: Write your number on the line. The number you write is the number of bats that flew out of the cave. How many flew out? ____________

17. 11 1 16 23 24 25 Name:_____________________Independent Practice 1 Steps Step one: Count ten bats. Step two: Draw a circle around the group of ten bats. Step three: Keep making groups of ten until you only ones left. Step four: Write the number of the group of tens in the tens column and the number of ones left over in the ones column. Step five: Write your number on the line. The number you write is the number of bats that flew out of the cave. 12 17 22 27 26 2 18 21 28 13 3 31 19 29 14 32 33 4 20 15 30 34 5 35 6 36 37 7 38 39 8 How many flew out? ____________ 9 10

18. Name:_____________________Independent Practice 2 Steps Step one: Count ten bats. Step two: Draw a circle around the group of ten bats. Step three: Keep making groups of ten until you only ones left. Step four: Write the number of the group of tens in the tens column and the number of ones left over in the ones column. Step five: Write your number on the line. The number you write is the number of bats that flew out of the cave. How many flew out? ____________

19. 11 1 16 23 24 25 Name:_____________________Independent Practice 2 Steps Step one: Count ten bats. Step two: Draw a circle around the group of ten bats. Step three: Keep making groups of ten until you only ones left. Step four: Write the number of the group of tens in the tens column and the number of ones left over in the ones column. Step five: Write your number on the line. The number you write is the number of bats that flew out of the cave. 12 17 22 27 2 26 18 21 13 3 29 28 19 14 4 30 20 15 5 31 32 6 7 33 8 How many flew out? ____________ 9 10

20. Name:_____________________Independent Practice 3 Steps Step one: Count ten bats. Step two: Draw a circle around the group of ten bats. Step three: Keep making groups of ten until you only ones left. Step four: Write the number of the group of tens in the tens column and the number of ones left over in the ones column. Step five: Write your number on the line. The number you write is the number of bats that flew out of the cave. How many flew out? ____________

21. 1 18 11 Name:_____________________Independent Practice 3 Steps Step one: Count ten bats. Step two: Draw a circle around the group of ten bats. Step three: Keep making groups of ten until you only ones left. Step four: Write the number of the group of tens in the tens column and the number of ones left over in the ones column. Step five: Write your number on the line. The number you write is the number of bats that flew out of the cave. 16 19 12 2 14 20 3 15 17 13 4 21 5 22 6 23 7 8 How many flew out? ____________ 9 10

22. How many bats did you count? Write the number here:___________________________