1. Give the missing number.
+ 36 = 81
58 + = 90
24 + 59 =

2. Give the missing number
202 + 131 + 34 = 
1 589 + 345 = 
357 + 242 = 

3. 0.429
Read the following decimals:
6.005
0.6405
3.0522 0.3984

4. Study the diagram below.
0.545 0.328
How far is Pepe’s house from Nelia’s house?
What operation will you use to find the answer?

5. Step 1 Step 2
Write the
numbers in
column,
align the
decimal
points
Step 3
Add as you
would add
whole
numbers.
Add from
right to left.
Place the
decimal point
in the sum in
line with the
decimal point
of the
addends.
0.545
+ 0.328
0.545
0.328
0.545
0.328
3780
1
0 873.

6. 16 + 13.56

7. 16
+ 13.56
6592 .

8. 0.257 + 0.212
0.316 + 0.45
0.587 + 19
5.98 + 25
34 + 13.6
Write in column, then add.

9. 0.257
+ 0.212
0.469
1.
0.587
+ 19
19.587
2.

10. 0.316
+ 0.45
0.766
3.
5.98
+ 25
30.98
4.

11. 34
+ 13.6
47.6
5.

12. How do you find the sum of
whole numbers and decimals?
1. Write the numbers in column, align
the decimal points.
2. Add from right to left.
3. Place the decimal point in the sum
in line with the decimal point of the
addends.

13. Find your way out of the woods. Do the process indicated to find your way out.
+
+
++
2.248 +
A
B
C
D
E
FG
H I J

14. Find your way out of the woods. Do the process indicated to find your way
out.
+
+
++
2.248 +
0.795
1.045
1.485
2.809
2.939
14.93915.171
15.331 17.579
17.802

15. Write in column, then find the sum.
1. 39 + 18.9 =
2. 0.341 + 14 =
3. 3.96 + 93 =
4. 20.1 + 0.647 =
5. 8 + 2.95 =

16. 39
+ 18.9
57.9
1.
0.341
+ 14
14.341
2.

17. 3.96
+ 93
96.96
3.
20.1
+ 0.647
20.747
4.

18. 8
+ 2.95
10.95
5.

19. Assignment:
Solve the problems.
1) Add 82.839 and 189.
2) The sum of 15.16, 97 and 68.3 is ____.
3) Add 16.82 to the sum of 43 and 18.28.
4) What is the answer when 215 is added
to 15.398?
5) What is the sum if 47.982 is added to
612?