### Worksheet 1: Basic 3-Digit Addition

#### Section A: Simple 3-Digit Addition

- 123 + 234 = ____
- 345 + 456 = ____
- 567 + 678 = ____
- 789 + 210 = ____
- 432 + 321 = ____

#### Section B: More 3-Digit Addition

- 654 + 321 = ____
- 876 + 543 = ____
- 198 + 602 = ____
- 754 + 245 = ____
- 689 + 311 = ____

#### Section C: Fill in the Blanks

- 1__3 + 234 = 367
- 345 + 4__6 = 801
- __67 + 678 = 1245
- 789 + __10 = 999
- 4__2 + 321 = 753

### Worksheet 2: Addition with Carrying

#### Section A: 3-Digit Addition with Carrying

- 128 + 276 = ____
- 439 + 562 = ____
- 784 + 239 = ____
- 567 + 488 = ____
- 654 + 376 = ____

#### Section B: More 3-Digit Addition with Carrying

- 572 + 689 = ____
- 783 + 527 = ____
- 649 + 386 = ____
- 458 + 593 = ____
- 731 + 289 = ____

#### Section C: Word Problems

- Maria has 123 apples and buys 456 more apples. How many apples does she have in total?
- There are 345 students in the school, and 567 more students join. How many students are there now?
- Tom has 432 marbles and wins 321 more in a game. How many marbles does he have now?
- A library has 789 books, and they receive a donation of 210 more books. How many books do they have now?
- Sarah collects 654 stickers and finds 376 more stickers. How many stickers does she have now?

### Worksheet 3: Fun 3-Digit Addition Activities

#### Section A: Color by Numbers (Use sums to find the colors)

- Color spaces with sum 400-500 = Red
- Color spaces with sum 500-600 = Blue
- Color spaces with sum 600-700 = Green

(Provide a simple picture with numbered sections)

#### Section B: 3-Digit Addition Maze

(Start from the top and follow the correct sums to find the way out)

(Provide a maze with 3-digit addition problems on the paths)

### Worksheet 4: Adding Large Numbers

#### Section A: Adding Larger 3-Digit Numbers

- 732 + 256 = ____
- 849 + 573 = ____
- 678 + 349 = ____
- 951 + 298 = ____
- 845 + 374 = ____

#### Section B: More Practice with Larger 3-Digit Numbers

- 978 + 563 = ____
- 692 + 481 = ____
- 745 + 239 = ____
- 836 + 147 = ____
- 983 + 217 = ____

#### Section C: Word Problems with Large Numbers

- A car dealer sold 732 cars last year and 256 cars this year. How many cars were sold in total?
- There are 849 people in one town and 573 people in another town. How many people are there in total?
- Tom has 678 marbles and wins 349 more marbles. How many marbles does he have in total?
- A library has 951 books and buys 298 more books. How many books do they have now?
- Sarah collects 845 stickers and receives 374 more stickers. How many stickers does she have now?

### Worksheet 5: Review and Application

#### Section A: Mixed 3-Digit Addition Problems

- 567 + 234 = ____
- 789 + 123 = ____
- 456 + 678 = ____
- 321 + 543 = ____
- 234 + 567 = ____

#### Section B: More Mixed 3-Digit Addition Problems

- 128 + 876 = ____
- 349 + 562 = ____
- 784 + 239 = ____
- 651 + 349 = ____
- 973 + 126 = ____

#### Section C: Word Problems

- There are 456 blue balloons and 789 red balloons. How many balloons are there in total?
- James has 123 crayons and buys 567 more crayons. How many crayons does he have now?
- Emma reads 432 pages of a book and 321 pages of another book. How many pages has she read in total?
- There are 789 birds in a tree, and 210 more birds join them. How many birds are there now?
- Lily has 654 flowers and picks 376 more flowers. How many flowers does she have in total?

#### Section D: True or False

- 123 + 456 = 579 (True/False)
- 789 + 210 = 999 (True/False)
- 345 + 567 = 912 (True/False)
- 432 + 321 = 753 (True/False)
- 654 + 376 = 1030 (True/False)

These worksheets provide a range of problems designed to help your students grasp 3-digit addition, starting with simple problems and gradually increasing in complexity. Feel free to print and use these in your classroom!

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