9. LET’S REVIEW
Directions: Round off the following to the
nearest given place value.
No. Given Round off to the nearest
Answer
1 0.356 tenths
2 1.2657 thousandths
3 3.9094 hundredths
4 0.47627 Ten thousandths
5 0.35734 tenths
12. 75.50 + 105 + 16.005 – 28.79
Before opening of classes,Tina
decided to open her coin bank to be able
to buy some school supplies that she
need. After counting all the coins, she
found out that she was able to save a
total of Php2457.50.If she is to buy a pair
of shoes for Php495.50, a coat for
Php527.20, and an umbrella for
Php94.75, how much will remain from her
savings?
13. ADDITION OF DECIMALS
495.50
+ 527.20
94.75
Write the
addends in
column in such a
way that all the
decimal points
are aligned with
each other, then
add.
1117.45
Php495.50+527.20+94.75 = N
14. SUBTRACTION OF DECIMALS
2457.50
-
Write the numbers
in column in such a way
that all the decimal points
are aligned with each
other, then subtract.
1117.45
/
10
/
4
5
0
.
0
4
13
Php2 457.50 – 1 117.45 = N
15. ADDITION OF DECIMALS
245 + 32.2 + 43.25 = N
245
+ 32.2
43.25
.00
0
0
4
.
0
1
2
1
3
Note:
Make the
number of decimal
places the same by
adding zero/es.
Be sure to put
a decimal point at the
end of a whole
number before adding
zero/es.
16. SUBTRACTION OF DECIMALS
52.8 – 4.26 = N
52.8
Note:
Make the
number of decimal
places the same by
adding zero/es.
Be sure to put
a decimal point at the
end of a whole
number before adding
zero/es.
- 4.26
0
10
4
.
7
/
5
/
12
/
4
/
8
4
18. LET’S PRACTICE
Solve for the sum.
1. 43 + 23.48 = N
2. 156.126 + 535 = N
3. 12.6 + 0.546 =N
4. 0.2377 + 231.2 = N
5. 20.24 + 0.212 + 0.0034 = N
19. LET’S PRACTICE
Solve for the difference.
1. 43.13 – 2.23 = N
2. 43.4 – 0.235 = N
3. 34 – 32.456 = N
4. 12.09 – 10.7 =N
5. 40.219 – 0.212 = N
20. To add or subtract decimal numbers:
1. Write the numbers in column in such a way
that the decimal points are aligned with each
other.
2. Add zero or zeroes to make the number of
decimal places the same.
3. Add or subtract.
Note:
Put a decimal point at the right of the number
if any of the numbers t be added or subtracted is
a whole number before adding zero.
ADDITION and SUBTRACTION OF DECIMALS
21. Directions: The table below shows the distance from kilometer
zero(Luneta, Manila to major points along the way to Batangas
City. Answer the questions that follow.
Luneta, Manila 0
Alabang, Muntinlupa 34.5
Calamba, Laguna 54.24
Sto. Thomas, Batangas 62
Lipa City 83.6
Batangas City 105
1. What is the distance between Batangas City and alabang,
Muntinlupa?
2. What is the sum of all the given distances?
3. Lipa City is how many kilometers away from Calamba,
Laguna?
4. From the distance of Batangas City, subtract the sum of the
distances Alabang, Muntinlupa and Calamba, Laguna.
22. Directions: Write the numbers in column,
then add or subtract.
1. 123.245 + 212. 123 = N
2. 9.25 + 0.245 + 12 = N
3. 156 + 0.734 + 3.2
4. 85.25 – 24.13 = N
5. 284 – 112.13 = N
6. 544.2 – 142.167 = N
23. Directions: Write the numbers in column,
then add or subtract.
1. 123.245 + 212. 123 = N
2. 9.25 + 0.245 + 12 = N
3. 156 + 0.734 + 3.2
4. 85.25 – 24.13 = N
5. 284 – 112.13 = N
6. 544.2 – 142.167 = N
24. Directions: Write the numbers in column,
then add or subtract.
1. 123.245 + 212. 123 = N
2. 9.25 + 0.245 + 12 = N
3. 156 + 0.734 + 3.2
4. 85.25 – 24.13 = N
5. 284 – 112.13 = N
6. 544.2 – 142.167 = N
25. Assignment: Solve the following:
7.) 50 - (23.245 + 12. 123) = N
8.) (0.25 + 0.245) – 0.026 = N
9.) (456 + 0.234 + 3.2) – 254.26
10.) (65.25 – 23.13) + 50 = N
26. Assignment: Solve the following:
1. 50 - (23.245 + 12. 123) = N
2. (0.25 + 0.245) – 0.026 = N
3. (456 + 0.234 + 3.2) – 254.26
4. (65.25 – 23.13) + 50 = N
5. 184 – (12.13 + 25.156) = N
