Students move from spotting errors to running the algorithm fluently. Part A is nine fill-in-the-blank problems, blending standard regrouping like 529 + 384 and 741 − 365 with borrow-across-zero work in 800 − 529 and 503 − 178. Two estimation prompts ask kids to round 612 + 289 and 847 − 392 to the nearest hundred. Part B is a four-pair matching round where 395 + 268 and 920 − 483 must line up with their correct totals.
Pairing exact answers with rounded estimates teaches third graders to check their work before circling it.
Style:
Three-Digit Addition and Subtraction
Part A: Fill in the Blank
Write the missing word or number on each line.
1. 529 + 384 = 913.
2. 741 - 365 = 376.
3. 268 + 457 = 725.
4. 800 - 529 = 271.
5. 347 + 486 = 833.
6. 654 - 279 = 375.
7. About how much is 612 + 289 when you round each to the nearest hundred? 900.
8. 503 - 178 = 325.
9. About how much is 847 - 392 when you round each to the nearest hundred? 400.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
395 + 268
→ 663
763
806 - 349
→ 457
437
174 + 589
→ 763
663
920 - 483
→ 437
457
Three-Digit Addition and Subtraction
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) 529 + 384 = 913.
2) 741 - 365 = 376.
3) 268 + 457 = 725.
4) 800 - 529 = 271.
5) 347 + 486 = 833.
6) 654 - 279 = 375.
7) About how much is 612 + 289 when you round each to the nearest hundred? 900.
8) 503 - 178 = 325.
9) About how much is 847 - 392 when you round each to the nearest hundred? 400.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
395 + 268
→ 663
763
806 - 349
→ 457
437
174 + 589
→ 763
663
920 - 483
→ 437
457
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10 Questions
10-15 minutes
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