The document provides examples of adding and subtracting decimals through column alignment. It includes step-by-step workings for addition and subtraction of decimals, as well as word problems involving decimals. Sample problems are provided throughout with the full working and answers shown.

1. + 36 = 81
45
24 + 59 = 83
58 + = 90
32
93 - = 48
45
+ 27 = 55
82
71 - 43 = 28

2. 12. 45
+ 10. 09
22. 4
201. 89
+ 198. 54
400. 4
1. 787
+ 0.556
2.4
9. 550
- 5. 450
4. 1
1. 333
- 0. 222
1.1

3. Edgar put P950.00 into a savings
account. After a while, P9.50 is added to
it. How much was in the account then?
P 950.00
+ 9.50
P 959.50
There was P959.50 in the savings account.

5. Edgar’s parents have P25,800.00 in a
checking account. How much is left in the
account after writing checks totalling to
P2,375.15?
P 25 800.00
+ 2 375. 15
P 22 624. 75
There is P22, 624.75 left in the checking account.

6. Steps in adding and subtracting decimals.
1. Arrange the numbers in column by aligning
the decimal point and the digits that belong to
the same value.
2. Add or subtract the digits.
3. Check the answer.

7. Solve the
following:
1. 16
+ 15.56
2. 37.21
- 19
3. 32.587
+ 1 9.63
4. 285 – 18.295 = ___
5. 98 + 25 + 16.3 = ___
GROUP ACTIVITY

8. Write in column, then
compute.
4. 30.1 + 120 – 97.639 = N
5. 19.61 – 8.75 + 2.95 = N
3. 62.5 + 3.96 + 93 = N
2. 89 – 29.341 + 14 = N
1. 39 + 18.9 – 15.6 = N

9. Solve the
problem.
1) Add 82.839 to the difference of 189 and
158.84.
2) The sum of 15.16, 97 and 68.3 is ____.
3) Add the difference of 25 and 16.82 to the
sum of 43 and 18.28.

10. ASSIGNMEN
T:
Solve.
1) 89 – 84.63 + 74.13 = N
2) 105.89 – 49 + 29.834 = N
3) What is the answer when 215 is added to
15.398?
4) What is the answer when 612 is added to the
difference of 65 and 47.982?