This Grade 2 worksheet trains learners to check addition and subtraction answers using inverse operations within 1000. Students choose the correct check equation in multiple choice, then compute inverse sums or differences in fill-in problems. By verifying work like 345+__=520 using the subtraction 520-345, Grade 2 students build strong accuracy habits and come to understand that addition and subtraction undo each other precisely every time.
Style:
Add & Subtract Within 1000
Part A: Multiple Choice
Circle the best answer for each question.
1. If 345 + ___ = 520, which subtraction checks the missing number?
A) 520 - 345
B) 345 - 520
C) 520 + 345
D) 345 + 520
2. Mia says 648 - 273 = 375. Which addition checks her work?
A) 375 + 273
B) 648 + 375
C) 648 + 273
D) 375 - 273
3. If 186 + 429 = 615, which subtraction proves 615 is correct?
A) 615 - 429
B) 615 + 186
C) 186 - 429
D) 429 + 186
4. Leo solved 702 - 348 = 354. Which check confirms his answer is right?
A) 354 + 348 = 702
B) 702 + 348 = 354
C) 354 - 348 = 702
D) 348 - 354 = 702
Part B: Fill in the Blank
Write the correct answer on each line.
1. To check 267 + ? = 500, compute 500 - 267 = 233
2. Check 814 - 236 = 578 by computing 578 + 236 = 814
3. Check 145 + 329 = 474 by computing 474 - 145 = 329
4. Check 603 - 258 = 345 by computing 345 + 258 = 603
5. To check 392 + ? = 700, compute 700 - 392 = 308
Add & Subtract Within 1000
★ Part A: Multiple Choice
Circle the best answer for each question.
1. If 345 + ___ = 520, which subtraction checks the missing number?
A) 520 - 345
B) 345 - 520
C) 520 + 345
D) 345 + 520
2. Mia says 648 - 273 = 375. Which addition checks her work?
A) 375 + 273
B) 648 + 375
C) 648 + 273
D) 375 - 273
3. If 186 + 429 = 615, which subtraction proves 615 is correct?
A) 615 - 429
B) 615 + 186
C) 186 - 429
D) 429 + 186
4. Leo solved 702 - 348 = 354. Which check confirms his answer is right?
A) 354 + 348 = 702
B) 702 + 348 = 354
C) 354 - 348 = 702
D) 348 - 354 = 702
★ Part B: Fill in the Blank
Write the correct answer on each line.
1) To check 267 + ? = 500, compute 500 - 267 = 233
2) Check 814 - 236 = 578 by computing 578 + 236 = 814
3) Check 145 + 329 = 474 by computing 474 - 145 = 329
4) Check 603 - 258 = 345 by computing 345 + 258 = 603
5) To check 392 + ? = 700, compute 700 - 392 = 308
Ready to Practice?
Complete each section carefully.
9 Questions
12-18 minutes
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