Year 3 Addition and Subtraction Worksheet - Intermediate

Year 3 Addition and Subtraction worksheet for Year 3 (Key Stage 2 / Year 3-6 (Ages 7-11)). Intermediate level maths practice, aligned to the UK National Curriculum. Print-ready with answer key included.

Maths•Key Stage 2 / Year 3-6 (Ages 7-11)•Additionintermediate

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Add It Up, Take It Away!

Year 3 | Ages 7–8 | Intermediate

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Instructions: Work through each activity carefully and show your thinking where you can. Use mental strategies for quick calculations, column methods for larger calculations, and inverse operations to check your answers.

Mental Maths: Add and Subtract

Work these out mentally. Think about partitioning numbers or making a multiple of 10 or 100. Write each answer in the box.

1. 346 + 7 =

2. 582 − 9 =

3. 427 + 50 =

4. 693 − 80 =

5. 218 + 300 =

6. 764 − 400 =

Column Addition

Set out each calculation using the column method. Keep the hundreds, tens and ones in the correct columns. Regroup where needed and write the total in the box.

1. 258 + 136 =

2. 347 + 285 =

3. 469 + 214 =

4. 176 + 508 =

5. 325 + 397 =

Column Subtraction

Set out each calculation using the column method. Check the place value of each digit and exchange where needed. Write the difference in the box.

1. 462 − 137 =

2. 531 − 268 =

3. 704 − 286 =

4. 800 − 457 =

5. 625 − 309 =

Estimate, Then Calculate

First round each number to the nearest 10 to estimate the answer. Then calculate exactly and use the inverse operation to check. Record all three results in the boxes.

1. 238 + 147: estimate ; exact answer ; inverse check (exact answer − 147)

2. 562 − 218: estimate ; exact answer ; inverse check (exact answer + 218)

3. 326 + 259: estimate ; exact answer ; inverse check (exact answer − 259)

4. 741 − 386: estimate ; exact answer ; inverse check (exact answer + 386)

Find the Missing Number

Use the inverse operation to find the missing number. Check each answer by putting it back into the calculation.

1. 236 + □ = 400

2. □ − 175 = 248

3. 520 − □ = 286

4. □ + 268 = 603

5. 714 − 289 = □

Addition and Subtraction Problems

Read each problem and choose addition or subtraction. Write a calculation as well as the answer in the box. Check that your answer makes sense.

1. A school library has 248 storybooks and 176 information books. How many books are there altogether?

2. A farmer picked 635 apples and sold 278. How many apples were left?

3. A coach needs 450 seats. There are 186 seats on the lower deck and 157 on the upper deck. How many more seats are needed?

4. Mia saved £275. She earned another £148. How much has she saved altogether?

5. A charity collected 702 cans. It delivered 356 cans to one centre and 189 to another. How many cans remained?

Answer Key

Activity 1: 353 ; 573 ; 477 ; 613 ; 518 ; 364

Activity 2: 394 ; 632 ; 683 ; 684 ; 722

Activity 3: 325 ; 263 ; 418 ; 343 ; 316

Activity 4: 1. Estimate 390, exact 385, check 238 ; 2. Estimate 340, exact 344, check 562 ; 3. Estimate 590, exact 585, check 326 ; 4. Estimate 350, exact 355, check 741

Activity 5: 164 ; 423 ; 234 ; 335 ; 425

Activity 6: 424 books ; 357 apples ; 107 seats ; £423 ; 157 cans