3-Digit Addition Multi-Addends 1 math worksheet with 20 problems and colorful animal illustrations.

Problem: Solve the 3-digit addition problems with multiple addends.

#### Solution:

We will solve each problem step by step, adding the numbers together. Let's go through each one:

---

Problem 1:

$$
165 + 54 + 223
$$
1. Add the first two numbers:
$$
165 + 54 = 219
$$
2. Add the result to the third number:
$$
219 + 223 = 442
$$
Answer: $ \boxed{442} $

---

Problem 2:

$$
406 + 153 + 325
$$
1. Add the first two numbers:
$$
406 + 153 = 559
$$
2. Add the result to the third number:
$$
559 + 325 = 884
$$
Answer: $ \boxed{884} $

---

Problem 3:

$$
276 + 134 + 65
$$
1. Add the first two numbers:
$$
276 + 134 = 410
$$
2. Add the result to the third number:
$$
410 + 65 = 475
$$
Answer: $ \boxed{475} $

---

Problem 4:

$$
424 + 336 + 151
$$
1. Add the first two numbers:
$$
424 + 336 = 760
$$
2. Add the result to the third number:
$$
760 + 151 = 911
$$
Answer: $ \boxed{911} $

---

Problem 5:

$$
243 + 228 + 76
$$
1. Add the first two numbers:
$$
243 + 228 = 471
$$
2. Add the result to the third number:
$$
471 + 76 = 547
$$
Answer: $ \boxed{547} $

---

Problem 6:

$$
382 + 156 + 227
$$
1. Add the first two numbers:
$$
382 + 156 = 538
$$
2. Add the result to the third number:
$$
538 + 227 = 765
$$
Answer: $ \boxed{765} $

---

Problem 7:

$$
513 + 243 + 165
$$
1. Add the first two numbers:
$$
513 + 243 = 756
$$
2. Add the result to the third number:
$$
756 + 165 = 921
$$
Answer: $ \boxed{921} $

---

Problem 8:

$$
343 + 256 + 308
$$
1. Add the first two numbers:
$$
343 + 256 = 599
$$
2. Add the result to the third number:
$$
599 + 308 = 907
$$
Answer: $ \boxed{907} $

---

Problem 9:

$$
527 + 65 + 336
$$
1. Add the first two numbers:
$$
527 + 65 = 592
$$
2. Add the result to the third number:
$$
592 + 336 = 928
$$
Answer: $ \boxed{928} $

---

Problem 10:

$$
342 + 128 + 86
$$
1. Add the first two numbers:
$$
342 + 128 = 470
$$
2. Add the result to the third number:
$$
470 + 86 = 556
$$
Answer: $ \boxed{556} $

---

Problem 11:

$$
287 + 156 + 224
$$
1. Add the first two numbers:
$$
287 + 156 = 443
$$
2. Add the result to the third number:
$$
443 + 224 = 667
$$
Answer: $ \boxed{667} $

---

Problem 12:

$$
329 + 308 + 175
$$
1. Add the first two numbers:
$$
329 + 308 = 637
$$
2. Add the result to the third number:
$$
637 + 175 = 812
$$
Answer: $ \boxed{812} $

---

Problem 13:

$$
336 + 151 + 270
$$
1. Add the first two numbers:
$$
336 + 151 = 487
$$
2. Add the result to the third number:
$$
487 + 270 = 757
$$
Answer: $ \boxed{757} $

---

Problem 14:

$$
563 + 37 + 239
$$
1. Add the first two numbers:
$$
563 + 37 = 600
$$
2. Add the result to the third number:
$$
600 + 239 = 839
$$
Answer: $ \boxed{839} $

---

Problem 15:

$$
228 + 360 + 96
$$
1. Add the first two numbers:
$$
228 + 360 = 588
$$
2. Add the result to the third number:
$$
588 + 96 = 684
$$
Answer: $ \boxed{684} $

---

Problem 16:

$$
549 + 63 + 37
$$
1. Add the first two numbers:
$$
549 + 63 = 612
$$
2. Add the result to the third number:
$$
612 + 37 = 649
$$
Answer: $ \boxed{649} $

---

Problem 17:

$$
420 + 217 + 348
$$
1. Add the first two numbers:
$$
420 + 217 = 637
$$
2. Add the result to the third number:
$$
637 + 348 = 985
$$
Answer: $ \boxed{985} $

---

Problem 18:

$$
155 + 128 + 137
$$
1. Add the first two numbers:
$$
155 + 128 = 283
$$
2. Add the result to the third number:
$$
283 + 137 = 420
$$
Answer: $ \boxed{420} $

---

Problem 19:

$$
497 + 65 + 284
$$
1. Add the first two numbers:
$$
497 + 65 = 562
$$
2. Add the result to the third number:
$$
562 + 284 = 846
$$
Answer: $ \boxed{846} $

---

Problem 20:

$$
337 + 366 + 245
$$
1. Add the first two numbers:
$$
337 + 366 = 703
$$
2. Add the result to the third number:
$$
703 + 245 = 948
$$
Answer: $ \boxed{948} $

---

Final Answers:

$$
\boxed{
\begin{array}{cccc}
442 & 884 & 475 & 911 \\
547 & 765 & 921 & 907 \\
928 & 556 & 667 & 812 \\
757 & 839 & 684 & 649 \\
985 & 420 & 846 & 948 \\
\end{array}
}
$$