This worksheet challenges Grade 3 students to solve real-world math scenarios using addition and subtraction.

Let's solve each problem step by step.

---

Problem 1:

There are 3254 children at a concert. There are 1369 fewer adults than children attending the concert.

#### a. How many adults are there at the concert?
- Number of children = 3254
- Number of adults = Number of children - 1369
- Calculation:
\[
3254 - 1369 = 1885
\]
- Answer: There are 1885 adults at the concert.

#### b. How many people are at the concert altogether?
- Total people = Number of children + Number of adults
- Calculation:
\[
3254 + 1885 = 5139
\]
- Answer: There are 5139 people at the concert altogether.

---

Problem 2:

In a books sale, 1461 books were sold on Friday. On Saturday, 2396 books were sold.

#### a. How many books were sold on both days?
- Books sold on Friday = 1461
- Books sold on Saturday = 2396
- Total books sold = Books sold on Friday + Books sold on Saturday
- Calculation:
\[
1461 + 2396 = 3857
\]
- Answer: 3857 books were sold on both days.

#### b. How many more books were sold on Saturday than on Friday?
- Difference in books sold = Books sold on Saturday - Books sold on Friday
- Calculation:
\[
2396 - 1461 = 935
\]
- Answer: 935 more books were sold on Saturday than on Friday.

---

Problem 3:

There are 765 blue and red balls in a box. There are 389 blue balls and the rest are red. Then he adds 270 red balls to the box. How many red balls are there in the box now?

#### Step 1: Find the number of red balls initially.
- Total balls = 765
- Blue balls = 389
- Red balls = Total balls - Blue balls
- Calculation:
\[
765 - 389 = 376
\]
- Initially, there are 376 red balls.

#### Step 2: Add 270 red balls to the box.
- New number of red balls = Initial red balls + 270
- Calculation:
\[
376 + 270 = 646
\]
- Answer: There are 646 red balls in the box now.

---

Problem 4:

Eli and Daisy collect 1527 stamps altogether. Eli collects 986 stamps. Charles collects 219 fewer stamps than Daisy. How many stamps does Charles collect?

#### Step 1: Find the number of stamps Daisy collects.
- Total stamps collected by Eli and Daisy = 1527
- Stamps collected by Eli = 986
- Stamps collected by Daisy = Total stamps - Stamps collected by Eli
- Calculation:
\[
1527 - 986 = 541
\]
- Daisy collects 541 stamps.

#### Step 2: Find the number of stamps Charles collects.
- Charles collects 219 fewer stamps than Daisy.
- Stamps collected by Charles = Stamps collected by Daisy - 219
- Calculation:
\[
541 - 219 = 322
\]
- Answer: Charles collects 322 stamps.

---

Final Answers:

1. a. \( \boxed{1885} \)
b. \( \boxed{5139} \)
2. a. \( \boxed{3857} \)
b. \( \boxed{935} \)
3. \( \boxed{646} \)
4. \( \boxed{322} \)