Problem 1:
Lucy went to the grocery store. She bought 12 packs of cookies and 16 packs of noodles. How many packs of groceries did she buy in all?
#### Solution:
To find the total number of packs of groceries Lucy bought, we need to add the number of packs of cookies and the number of packs of noodles.
- Number of packs of cookies: 12
- Number of packs of noodles: 16
Now, perform the addition:
\[
12 + 16 = 28
\]
#### Answer:
\[
\boxed{28}
\]
---
Problem 2:
Roden went to a pet shop. He bought 15 gold fish, 7 blue fish, and 3 packages of fish food. How many fish did he buy?
#### Solution:
To find the total number of fish Roden bought, we need to add the number of gold fish and the number of blue fish. Note that the packages of fish food are not included in the count of fish.
- Number of gold fish: 15
- Number of blue fish: 7
Now, perform the addition:
\[
15 + 7 = 22
\]
#### Answer:
\[
\boxed{22}
\]
---
Problem 3:
I read 21 pages of my English book yesterday in just 45 minutes. Today, I read 117 pages. What is the total number of pages that I read?
#### Solution:
To find the total number of pages read, we need to add the number of pages read yesterday to the number of pages read today.
- Pages read yesterday: 21
- Pages read today: 117
Now, perform the addition:
\[
21 + 117 = 138
\]
#### Answer:
\[
\boxed{138}
\]
---
Final Answers:
1. \(\boxed{28}\)
2. \(\boxed{22}\)
3. \(\boxed{138}\)
Parent Tip: Review the logic above to help your child master the concept of addition problem solving worksheet for grade 2.