Math worksheet for finding missing addends in decimal addition problems, including a cute rabbit illustration.

To find the missing addend in an addition problem, you can use subtraction. The rule is:

Total - Known Number = Missing Number

Here are the step-by-step calculations for each problem on the sheet:

First Column:
1. $5.1 - 3.9 = 1.2$
2. $5.7 - 2.2 = 3.5$
3. $3.9 - 1.6 = 2.3$
4. $1.9 - 0.5 = 1.4$
5. $4.2 - 2.5 = 1.7$
6. $7.2 - 5.7 = 1.5$
7. $5.1 - 3.3 = 1.8$
8. $5.3 - 2.7 = 2.6$

Second Column:
9. $3.9 - 2.1 = 1.8$
10. $8.4 - 3.5 = 4.9$
11. $7.1 - 0.9 = 6.2$
12. $3 - 1.1 = 1.9$
13. $6.1 - 3.2 = 2.9$
14. $7 - 3.6 = 3.4$
15. $8 - 3.8 = 4.2$
16. $6.4 - 3.7 = 2.7$

Third Column:
17. $1.2 - 0.1 = 1.1$
18. $7.8 - 3.6 = 4.2$
19. $1.5 - 0.6 = 0.9$
20. $3 - 1.4 = 1.6$
21. $7.6 - 3.8 = 3.8$
22. $9.6 - 4.9 = 4.7$

Final Answer:
Column 1:
1.2
3.5
2.3
1.4
1.7
1.5
1.8
2.6

Column 2:
1.8
4.9
6.2
1.9
2.9
3.4
4.2
2.7

Column 3:
1.1
4.2
0.9
1.6
3.8
4.7