The document provides instruction on rounding decimal numbers to the nearest whole number or tenths. It explains that to round to the nearest whole number, you look at the tenths digit and round up if it is 5 or greater, rounding down if it is 4 or less. To round to the nearest tenths, you look at the hundredths digit and use the same rule. Examples are provided of rounding various decimal numbers according to these rules. The document also covers comparing and arranging decimal numbers from greatest to least.

1. MATHEMATICS 4
WEEK 9

2. Rounding Off, Arranging
and Comparing Decimal
Numbers

3. LEARNING COMPETENCIES
Quarter 2, Week 9
• Round decimal numbers to the
nearest whole number and tenths
• Compare and arrange decimal
numbers.

4. Upang maunawaan ng husto ang tungkol sa
tunog, Tara at maglaro tayo!
REVIEW

5. tekhnologic
What is the place value of the
underlined digit?
23.56
>
C tenths
A
hundreds
B
ones
D
hundredth
s

6. tekhnologic
What is the place value of the
underlined digit?
28.912
>
B hundredths
A tenths
D hundreds
C ones

7. tekhnologic
What is the place value of the
underlined digit?
269.34
>
A ones
D tenths
B tens
C hundreds

8. tekhnologic
What is the value of the
underlined digit?
33.416
>
B 0.01
A 0.1 C 0.001
D 100

9. tekhnologic
What is the value of the
underlined digit?
54.210
>
B 50
A 500
D 0.05
C 0.5

10. Rounding Off
Decimal Numbers.

11. Find your place
Look next door
5 or greater, add one more
All digits in front stay the same
All digits behind, zero’s your name.
https://www.onlinemathlearning.com/round-math.html

12. Matthew went to the supermarket. He
bought some groceries with prices as
shown below. He estimated the total cost
of groceries before going to the cashier.
About how much was the total cost of the
groceries?
Item Price Rounded to the nearest
whole numbers
Sugar Php32.75
Bread Php64.25
Cookies Php35.10
Milk Php105.50
Porkchop Php185.00
Matthew will spend about
_____________

13. Sugar
32.75
Find your place
Look next door
5 or greater, add
one more
3
All digits in front
stay the same
All digits behind,
zero’s your name.
3 00

14. Below is the list of items Matthew
bought at the grocery store. If the
price of each item is rounded to the
nearest whole numbers, about how
much money does he spend?
Item Price Rounded to the nearest
whole numbers
Sugar Php32.75
Bread Php64.25
Cookies Php35.10
Milk Php105.50
Porkchop Php185.00
Matthew will spend about
_____________
Php33.00

15. Bread
64.25
Find your place
Look next door
5 or greater, add
one more
6
All digits in front
stay the same
All digits behind,
zero’s your name.
4 00

16. Below is the list of items Matthew
bought at the grocery store. If the
price of each item is rounded to the
nearest whole numbers, about how
much money does he spend?
Item Price Rounded to the nearest
whole numbers
Sugar Php32.75
Bread Php64.25
Cookies Php35.10
Milk Php105.50
Porkchop Php185.00
Matthew will spend about
_____________
Php33.00
Php64.00

17. Cookies
35.10
Find your place
Look next door
5 or greater, add
one more
3
All digits in front
stay the same
All digits behind,
zero’s your name.
5 00

18. Below is the list of items Matthew
bought at the grocery store. If the
price of each item is rounded to the
nearest whole numbers, about how
much money does he spend?
Item Price Rounded to the nearest
whole numbers
Sugar Php32.75
Bread Php64.25
Cookies Php35.10
Milk Php105.50
Porkchop Php185.00
Matthew will spend about
_____________
Php33.00
Php64.00
Php35.00

19. Milk
105.50
Find your place
Look next door
5 or greater, add
one more
0
All digits in front
stay the same
All digits behind,
zero’s your name.
6 00
1

20. Below is the list of items Matthew
bought at the grocery store. If the
price of each item is rounded to the
nearest whole numbers, about how
much money does he spend?
Item Price Rounded to the nearest
whole numbers
Sugar Php32.75
Bread Php64.25
Cookies Php35.10
Milk Php105.50
Porkchop Php185.00
Matthew will spend about
_____________
Php33.00
Php64.00
Php35.00
Php106.00

21. Porkchop
185.00
Find your place
Look next door
5 or greater, add
one more
8
All digits in front
stay the same
All digits behind,
zero’s your name.
5 00
1

22. Below is the list of items Matthew
bought at the grocery store. If the
price of each item is rounded to the
nearest whole numbers, about how
much money does he spend?
Item Price Rounded to the nearest
whole numbers
Sugar Php32.75
Bread Php64.25
Cookies Php35.10
Milk Php105.50
Porkchop Php185.00
Matthew will spend about
_____________
Php33.00
Php64.00
Php35.00
Php106.00
Php185.00
Php423.00

23. Round off each of the following to the nearest
whole number
1) 12.45
2) 36.2
3) 53.70
4) 91.10
5) 89.203
12.00
36.00
54.00
91.00
89.00

24. 1) 25.62
2) 12.74
3) 34.56
4) 53.49
5) 12.30

25. 25.62
Find your place
Look next door
5 or greater, add
one more
6
All digits in front
stay the same
All digits behind,
zero’s your name.
2 0
5

26. 1) 25.62
2) 12.74
3) 34.56
4) 53.49
5) 12.30
25.60

27. 12.74
Find your place
Look next door
5 or greater, add
one more
7
All digits in front
stay the same
All digits behind,
zero’s your name.
1 0
2

28. 1) 25.62
2) 12.74
3) 34.56
4) 53.49
5) 12.30
25.60
12.70

29. 34.56
Find your place
Look next door
5 or greater, add
one more
6
All digits in front
stay the same
All digits behind,
zero’s your name.
3 0
4

30. 1) 25.62
2) 12.74
3) 34.56
4) 53.49
5) 12.30
25.60
12.70
34.60

31. 53.49
Find your place
Look next door
5 or greater, add
one more
5
All digits in front
stay the same
All digits behind,
zero’s your name.
5 0
3

32. 1) 25.62
2) 12.74
3) 34.56
4) 53.49
5) 12.30
25.60
12.70
34.60
53.50

33. 12.30
Find your place
Look next door
5 or greater, add
one more
3
All digits in front
stay the same
All digits behind,
zero’s your name.
1 0
2

34. 1) 25.62
2) 12.74
3) 34.56
4) 53.49
5) 12.30
25.60
12.70
34.60
53.50
12.30

35. Round off the decimals to the nearest tenths
1) 3.45
2) 26.21
3) 33.730
4) 81.192
5) 99.203
3.40
26.20
33.700
81.200
99.200

36. Comparing and
Arranging Decimal
Numbers.

37. Example: Arrange 23.471, 46.201, and
99.8 in ascending and descending
orders.
Comparing and Arranging Decimal Numbers
Step 1 : Stack the numbers being compared. Line up
the decimal points.
2 3 . 4 7 1
4 6 . 2 0 1
9 9 . 8

38. Example: Arrange 23.471, 46.201, and
99.8 in ascending and descending
orders.
Comparing and Arranging Decimal Numbers
Step 2 : Add zeros so that each number has the
same number of decimal digits.
2 3 . 4 7 1
4 6 . 2 0 1
9 9 . 8 0 0

39. Example: Arrange 23.471, 46.201, and
99.8 in ascending and descending
orders.
Comparing and Arranging Decimal Numbers
Step 3 : Compare each place value one by one
starting from the left. If a number is the same,
move to the next place value.
2 3 . 4 7 1
4 6 . 2 0 1
9 9 . 8 0 0 greatest number
least number

40. Example: Arrange 23.471, 46.201, and
99.8 in the ascending and descending
orders.
Comparing and Arranging Decimal Numbers
Step 4: Order the numbers. Remove the zeros you
previously added.
Ascending Order (Least to Greatest):
23.471 , 46.201 , 99.8
Descending Order (Greatest to Least):
99.8 , 46.201 , 23.471
2 3 . 4 7 1
4 6 . 2 0 1
9 9 . 8 0 0 greatest number
least number

41. Example: Arrange 0.89, 0.7, and 0.666 in
the ascending and descending orders.
Comparing and Arranging Decimal Numbers
Step 1 : Stack the numbers being compared. Line up
the decimal points.
0 . 8 9
0 . 7
0 . 6 6 6

42. Example: Arrange 0.89, 0.7, and 0.666 in
the ascending and descending orders.
Comparing and Arranging Decimal Numbers
Step 2 : Add zeros so that each number has the
same number of decimal digits.
0 . 8 9 0
0 . 7 0 0
0 . 6 6 6

43. Example: Arrange 0.89, 0.7, and 0.666 in
the ascending and descending orders.
Comparing and Arranging Decimal Numbers
Step 3 : Compare each place value one by one
starting from the left. If a number is the same, move
to the next place value.
0 . 8 9 0
0 . 7 0 0
0 . 6 6 6
greatest number
least number

44. Example: Arrange 0.89, 0.7, and 0.666 in
the ascending and descending orders.
Comparing and Arranging Decimal Numbers
Step 4: Order the numbers. Remove the zeros you
previously added.
Ascending Order (Least to Greatest):
0.666 , 0.7 , 0.89
Descending Order (Greatest to Least):
0.89 , 0.7 , 0.666
0 . 8 9 0
0 . 7 0 0
0 . 6 6 6
greatest number
least number

45. 1) 21.75 ____ 21.75
2) 47.31 ____ 39.73
3) 53.5 ____ 53.12
4) 0.2 ____ 0.25
5) 60.25 ____ 60.25
=
>
0 >
0 <
=

46. ACTIVITY
TIME

47. May kaugnayan sa mga tunog na iyan ang kwento
natin sa araw na ito. Kaya naman maupo tayong
mabuti at makinig sa kwento.
Move through the maze by
coloring numbers that round
to 7.
6.6 6.3 4.8 5.9
6.9 7.6 6.2 8.1
7.2 6.8 7.1 6.3
7.8 6.2 6.5 7.1
START
FINISH

48. May kaugnayan sa mga tunog na iyan ang kwento
natin sa araw na ito. Kaya naman maupo tayong
mabuti at makinig sa kwento.
Move through the maze by
coloring numbers that round
to 7.
6.6 6.3 4.8 5.9
6.9 7.6 6.2 8.1
7.2 6.8 7.1 6.3
7.8 6.2 6.5 7.1
START
FINISH

49. May kaugnayan sa mga tunog na iyan ang kwento
natin sa araw na ito. Kaya naman maupo tayong
mabuti at makinig sa kwento.
Move through the maze by
coloring numbers where the
tenth is rounded to 6 tenths
5.57 8.63 7.55 9.67
6.54 7.65 3.58 5.51
2.69 7.53 8.64 6.56
7.8 6.2 1.51 7.61
START
FINISH

50. May kaugnayan sa mga tunog na iyan ang kwento
natin sa araw na ito. Kaya naman maupo tayong
mabuti at makinig sa kwento.
Move through the maze by
coloring numbers where the
tenth is rounded to 6 tenths
5.57 8.63 7.55 9.67
6.54 7.65 3.58 5.51
2.69 7.53 8.64 6.56
7.8 6.2 1.51 7.61
START
FINISH

51. May kaugnayan sa mga tunog na iyan ang kwento
natin sa araw na ito. Kaya naman maupo tayong
mabuti at makinig sa kwento.
Write the correct comparison
symbol (< , > , = ) in each box
1) 2.36 2.35
2) 9.85 9.82
3) 1.7 1.75
4) 4.17 0.417
5) 9.98 9.98

52. May kaugnayan sa mga tunog na iyan ang kwento
natin sa araw na ito. Kaya naman maupo tayong
mabuti at makinig sa kwento.
Write the correct comparison
symbol (< , > , = ) in each box
1) 2.36 2.35
2) 9.85 9.82
3) 1.7 1.75
4) 4.17 0.417
5) 9.98 9.98
>
>
<
>
=

53. Rounding Decimal Numbers to the nearest Whole
Number
1) We look at the number we want to round.
2) As we are rounding our number to the
nearest whole, we mark the digit in the
one's place.
3) Now we look at the ‘tenths’ place (the
digit to the right of the decimal point).

54. Rounding Decimal Numbers to the nearest Whole
Number
4) If the digit in the tenths column is 0, 1, 2, 3
or 4, we will round down the number at the
ones place to the nearest whole number.
If the digit in the tenths column is 5, 6, 7, 8
or 9, we will round up the number at the
one's place to the nearest whole number.
5) Rewrite the number and replace all digits
to the right of the given place with zeros.

55. Rounding Decimal Numbers to the nearest Tenths
1) We look at the number we want to round.
2) As we are rounding our number to the
nearest tenths, we mark the digit in the
tenths place.
3) Now we look at the ‘hundredths’ place
(the digit to the right of the tenths column).

56. Rounding Decimal Numbers to the nearest Tenths
4) If the digit in the hundredths place is 0, 1, 2,
3 or 4, we will round down the number at the
ones place to the nearest whole number.
If the digit in the hundredths place is 5, 6, 7,
8 or 9, we will round up the number at the
one's place to the nearest whole number.
5) Rewrite the number and replace all digits
to the right of the given place with zeros.

57. Comparing and Arranging Decimal
Numbers
1) Stack the numbers being compared. Line up the
decimal points.
2) Add zeros so that each number has the same
number of decimal digits.
3) Compare each place value one by one starting from
the left. If a number is the same, move to the next
place value.
4) Order the numbers. Remove the zeros you
previously added.

59. s
source: https://giphy.com/gifs/4HnUSlhyxJKf4RdgHT/html5