The document reviews concepts of visualizing and identifying numbers from 101 to 1,000, emphasizing place value, expanded form, and representation in both symbols and words. It explains methods for comparing, ordering, and determining the position of numbers, including steps to compare and arrange them correctly from greatest to least and least to greatest. Additionally, it introduces ordinal numbers and guidelines for identifying their positions based on a point of reference.

1. MATH Unit Review

2. Visualizing and Identifying Numbers
from 101 to 1,000
• To visualize and identify numbers from 101 to
1,000, represent the numbers by objects and
counting object, then by one hundreds, tens
and ones.

3. Visualizing and Identifying Numbers
from 101 to 1,000
• To visualize numbers, we use symbols and each
symbols represents the value of the numbers.
1,000 100 10
1

4. 1,000
100 10
1
1,000 1,000 1,000 1,000
100 100
1 1
5,313

5. 1,000
100 10
1
1,000
100 100
1
2,622
100 100 100
10

6. 100 10
100 100
1
671
100 100 100
10
10
10 10
10 10

7. Place Value and Value of Each Digit
in a 3-digit Number
• Place value tells the position of the digits in a
given 3-digits, then the place values are one,
tens, and hundreds.

8. • In determining the place value, start from the
right digit, which is the ones, and then move to
the left to the hundreds.
Example: 123
Hundreds Tens Ones
1 2 3

9. Identify the place value of the underlined
digit.
1.195 =
2.278 =
3.442 =
4.782 =
5.971 =
tens
ones
hundreds
hundreds
tens

10. • In identifying the value of each digit, always
refer to the place value of the digits. The value
in the hundreds is 100, for tens is 10 and for
ones is 1.
Hundreds Tens Ones
1 2 3
100 20 3

11. Identify the value of the underlined digit.
1.195 =
2.278 =
3.442 =
4.782 =
5.971 =
90
8
400
900
80

12. Writing Three-Digit Numbers in
Expanded Form
• Numbers can be written or expressed in
expanded form using the place value and the
value of each digit. Express it as a sum of the
values of each digit.

13. • Identify the value of each digit in their place
value.
Example: 456
Hundreds Tens Ones
4 5 6
400 50 6
Expanded Form = 400 + 50 + 6

14. Write the expanded form of the
number.
1.962 =
2.815 =
3.381 =
4.697 =
5.534 =
900 + 60 + 2
800 + 10 + 5
300 + 80 + 1
600 + 90 + 7
500 + 30 + 4

15. Reading and Writing Numbers from
101 to 1,000 in Symbols and in
Words.
• Numbers can be expressed or written in
symbols and in words.
Symbols Words
978 Nine hundred seventy-eight

16. Numbers
1 one 11 eleven 30 thirty
2 two 12 twelve 40 forty
3 three 13 thirteen 50 fifty
4 four 14 fourteen 60 sixty
5 five 15 fifteen 70 seventy
6 six 16 sixteen 80 eighty
7 seven 17 seventeen 90 ninety
8 eight 18 eighteen
100 hundred
9 nine 19 nineteen
10 ten 20 twenty

17. Write this number into words.
587
Five hundred eighty-seven

18. Comparing Numbers
• We compare numbers based on the value of
the highest place value.
Greater than (>) Less than (<) Equal to (=)

19. Steps in comparing numbers:
1. Count all of the digits of the number.
2. Align the numbers from the ones place value.
3. Compare the first digit of the two numbers
from left to right.
4. If the first digits of the two numbers are the
same, compare to the next digit to the right until
you found their differences.

20. Steps in comparing numbers:
1. Count all of the digits of the number.
6,556 656
>

21. Steps in comparing numbers:
1. Count all of the digits of the number.
882 828

22. Steps in comparing numbers:
2. Align the numbers from the ones place value.
882
828

23. Steps in comparing numbers:
3. Compare the first digit of the two numbers
from left to right.
882
828

24. Steps in comparing numbers:
4. If the first digits of the two numbers are the
same, compare to the next digit to the right until
you found their differences.
882
828

25. 882 828
>
• Think of the signs like the mouth of an alligator.
The alligator is greedy and always eats the
larger number.

26. Write < > or =
176 189
<

27. Write < > or =
367 123
>

28. Write < > or =
354 354
=

29. Ordering Numbers
• Ordering numbers is putting numbers in a
given order, either from Greatest to Least or
from Least to Greatest.

30. Ordering Numbers
• Greatest to Least – arranging numbers from
the biggest number to the smallest number.
536, 227, 126

31. Ordering Numbers
• Least to Greatest – arranging numbers from
the smallest number to the biggest number.
572, 671, 947

32. Arrange the following numbers from
Least to Greatest by writing the
correct order.
572, 671, 947, 731
1 2 3 4
1 2 4 3

33. Arrange the following numbers from
Greatest to Least by writing the
correct order.
572, 671, 947, 731
1 2 3 4
3 4 2 1

34. REMEMBER:
• In arranging the numbers from Greatest to
Least or Least to Greatest, always start writing
the first number on the left.

35. Ordinal Numbers
• Ordinal Numbers - These are number that tell
the position of the objects in a given set. It is
determined by where the object is, using the
point of reference.
Point of References:
Left to Right
Right to Left

36. Steps in identifying the ordinal number
or position of the items in the given set.
1. Determine first the given point of reference.
2. Count the items based on the given point of
reference (left to right/right to left).
3. Identify the position of the item based on how
you count the items using their point of
reference.

37. Identify the position of the underlined
letter from left to right.
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T
1. Determine first the given point of reference.
2. Count the items based on the given point of
reference.

38. Identify the position of the underlined
letter from left to right.
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T
3. Identify the position of the item based on how
you count the items using their point of
reference.
L = 12th

39. From left to right, what is the position
of the bee that is carrying honey? 10th

40. From left to right, what is the fruit
in the 16th position?
Jackfruit

41. From right to left, what is the fruit
in the 13th position?
Avocado