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In Grade 3, students learn to solve problems that require both addition and subtraction. These mixed-operation problems help children understand real-life situations, improve logical thinking, and strengthen calculation skills. On this page, you will find solved examples, practice exercises, worksheets, and word problems involving addition and subtraction together in one problem.
What Does Addition and Subtraction Together Mean?
Addition and subtraction together means solving a math problem that contains both adding and subtracting numbers in the same question. We add some numbers and subtract others to find the final answer.
Note: Students may need to add numbers first and then subtract.
Solved Examples on Mixed Addition and Subtraction Together:
Study the following examples:
1. Simplify: 810 – 217 + 186.
Solution:
810 – 217 + 186.
= 810 + 186 – 217; [First arrange the numbers to be added and then subtract.]
= 996 – 217
= 779
Therefore, 810 – 217 + 186 = 779.
2. Simplify: 7784 – 3085 + 1596 – 2967.
Solution:
Step I: Add the numbers with ‘+’ sign before them. (7784 and 1596)
7784 + 1596
Step II: Add the numbers with ‘-‘ sign before them. (-3085 and -2967)
3085 + 2967
Step III: Subtract second sum from the first sum.
9380 – 6052
Therefore, 7784 – 3085 + 1596 – 2967 = 3328.
Mixed Addition and Subtraction Word Problems:
1. A library had 425 books. It bought 150 new books and later gave away 75 books. How many books does the library have now?
Solution:
425 + 150 – 75
= 575 – 75
= 500
Answer: 500 books
2. A farmer harvested 850 mangoes. He sold 325 mangoes and then harvested 180 more mangoes. How many mangoes does he have now?
Solution:
850 – 325 + 180
= 525 + 180
= 705
Answer: 705 mangoes
3. A shop had 560 toys. It received 145 new toys and sold 210 toys. How many toys are left?
Solution:
560 + 145 – 210
= 705 – 210
= 495
Answer: 495 toys
4. A school collected ₹750 for a charity event. It spent ₹280 on supplies and later received ₹125 more in donations. How much money does the school have now?
Solution:
750 – 280 + 125
= 470 + 125
= 595
Answer: ₹595
Common Mistakes Students Make:
- Forgetting to perform both operations.
- Adding when subtraction is required.
- Making borrowing or carrying errors.
- Skipping a calculation step.
- Writing the wrong final answer.
Play Addition and Subtraction Together Quiz Game:
🎯 Mixed Addition & Subtraction Quiz
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Worksheet on Mixed Addition and Subtraction Together:
A. Solve the Following
1. 348 + 127 − 95 = _____
2. 620 − 245 + 138 = _____
3. 275 + 316 − 142 = _____
4. 900 − 375 + 184 = _____
5. 432 + 258 − 176 = _____
6. 750 − 286 + 149 = _____
7. 185 + 427 − 218 = _____
8. 840 − 392 + 165 = _____
9. 365 + 284 − 129 = _____
10. 700 − 248 + 175 = _____
B. Word Problems
1. A library had 425 books. It received 165 new books and later gave away 120 books. How many books does the library have now?
2. A farmer harvested 680 mangoes. He sold 245 mangoes and then harvested 130 more mangoes. How many mangoes does he have now?
3. A toy shop had 350 toys. It received 185 new toys and sold 140 toys. How many toys are left in the shop?
4. A school collected ₹850 for a charity event. It spent ₹325 on decorations and later received ₹175 more. How much money does the school have now?
5. A bus carried 275 passengers. At one stop, 125 passengers got off and 85 new passengers got on. How many passengers are on the bus now?
Answers
A.
1. 380
2. 513
3. 449
4. 709
5. 514
6. 613
7. 394
8. 613
9. 520
10. 627
B.
1. 470 books
2. 565 mangoes
3. 395 toys
4. ₹700
5. 235 passengers
Frequently Asked Questions on Mixed Addition and Subtraction:
Answer:
Mixed addition and subtraction means solving math problems that contain both addition and subtraction operations. Students may need to add and subtract numbers in the same problem to find the final answer.
Answer:
Learning mixed addition and subtraction helps Grade 3 students improve their arithmetic skills, logical thinking, and problem-solving abilities. It also prepares them for more advanced math topics.
Answer:
Yes. Worksheets provide structured practice and help students master addition and subtraction skills through a variety of exercises and word problems.
Answer:
Students should avoid:
- Using the wrong operation.
- Skipping a calculation step.
- Making carrying or borrowing errors.
- Writing incorrect place values.
- Not checking their answers.
About Author
Written by Priyanka Ghosh
Mathematics Educator | Founder of Math Only Math
Priyanka Ghosh has been teaching elementary and middle-school mathematics for over 12 years and specializes in creating simple, child-friendly math lessons and worksheets.
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