1. This is one hundred squares and I know because we built it together.....

2. The grid is one hundred because one ten fits...

3. The grid is one hundred because 2 tens fit... 20

4. The grid is one hundred because 3 tens fit... 30

5. The grid is one hundred because 4 tens fit... 40

6. The grid is one hundred because 5 tens fit... 50

7. The grid is one hundred because 6 tens fit... 60

8. The grid is one hundred because 7 tens fit... 70

9. The grid is one hundred because 8 tens fit... 80

10. The grid is one hundred because 9 tens fit... 90

11. The grid is one hundred because 10 tens fit... 100

16. What number have I built?.
Be sure the students are seeing the link between the place value cards and the hundred grids.

17. I see 5 tens and 4 ones... That is 54 or fifty-four.
standard notation or form
50 + 4
expanded notation or form 4 5 4 50

18. I can also explain it as 4 tens and 14 ones Which I write as 40 + 14.

19. Or 3 tens and 24 ones
Which I write as .

20. Or 2 tens and 34 ones
Which I write as .

21. Or 1 ten and 44 ones
Which I write as .

22. I am still using place value: 50 + 4 5 tens, four ones 5 tens, 4 ones
tens, fourteen ones tens, 14 ones
tens, twenty-four ones 3 tens, 24 ones
tens, thirty-four ones 2 tens, 34 ones
ten, fifty-four ones ten, 44 ones
Be sure students understand that you could groups the tens different ways but still be using or maintaining place value understandings...

23. If I put them in the hundred grid they look like this.

24. or I could just colour the grid to match my number
Some students really benefit from seeing that the blocks in tens can match the hundred grid. The physical link is important for them to make or be reminded of.

25. Can you still see these expressions 40 + 14 30 + 24 20 + 34 10 + 44
Be sure students understand that you could groups the tens different ways but still be using or maintaining place value understandings...

26. Let’s look at another one....

31. tens, 8 ones
tens, 18 ones
tens, 28 ones
ten, 38 ones
48 ones
Can you see my pattern?

32. Ready?
Can you see it on a numberline?

33. Can you see it on a numberline?

35. Can you see it on a numberline?

37. Can you see it on a numberline?

38. Ready?
Can you see it on a numberline?

39. Can you see it on a numberline?

41. Can you see it on a numberline?

43. Can you see it on a numberline?

44. Ready?
Can you see it on a numberline?

45. Can you see it on a numberline?

47. Can you see it on a numberline?

49. Can you see it on a numberline?