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Grade 3 Quiz: Addition & Subtraction — Easy Version 1
Grade 3 · MathSheets Name: ____________________ Date: __________
Answer every question. The lesson name before each question tells you which skill it checks — open that lesson if you need a reminder.
How to solve
This quiz mixes questions from different lessons, like a real test. Read each question carefully: the lesson name in front tells you what kind of problem it is. Check your answers, then practise the lessons where you made mistakes.
Example
3-Digit Subtraction with Borrowing: 956 − 418 = 953 − ___
Answer: 415
Not quite. The answer is
💡 77 rounds to 80, because the ones digit 7 is 5 or more, so round up. 11 rounds to 10, because the ones digit 1 is less than 5, so round down. Then 80 − 10 = 70. The answer is about 70.
✓ Correct!
Not quite. The answer is
💡 77 rounds to 80, because the ones digit 7 is 5 or more, so round up. 11 rounds to 10, because the ones digit 1 is less than 5, so round down. Then 80 − 10 = 70. The answer is about 70.
💡 How to solve: Estimating Sums & Differences
To estimate, round each number, then do the easy math. For 348 + 529, round to the nearest hundred: 300 + 500 = 800. So the answer is about 800. Estimating helps you check if an exact answer makes sense.
Try a similar one
Estimate 59 + 57 by rounding each number to the nearest ten.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 Ones: 1 − 1 = 0. Tens: 1 is less than 9, so regroup 1 from the hundreds. Now 11 − 9 = 2. Hundreds: the 2 is now 1. 1 − 1 = 0. So 211 − 191 = 20.
✓ Correct!
Not quite. The answer is
💡 Ones: 1 − 1 = 0. Tens: 1 is less than 9, so regroup 1 from the hundreds. Now 11 − 9 = 2. Hundreds: the 2 is now 1. 1 − 1 = 0. So 211 − 191 = 20.
💡 How to solve: Multi-Digit Addition & Subtraction (Mixed Review)
Line up the ones, tens and hundreds. Work from right to left, carrying when a column adds to 10 or more, and borrowing when the top digit is too small to subtract.
Try a similar one
200 + 196 = ___
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 Add the parts together: 800 + 50 + 15 = 865.
✓ Correct!
Not quite. The answer is
💡 Add the parts together: 800 + 50 + 15 = 865.
💡 How to solve: 3-Digit Addition with Regrouping
Add one column at a time, starting with the ones. For 368 + 257: ones 8 + 7 = 15, write 5 and carry 1 ten. Tens 6 + 5 + 1 = 12, write 2 and carry 1 hundred. Hundreds 3 + 2 + 1 = 6. So 368 + 257 = 625.
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218 + 607 = ___
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 60 is 6 tens. Count back by tens from 594: 584, 574, 564, 554, 544, 534. So 594 − 60 = 534.
✓ Correct!
Not quite. The answer is
💡 60 is 6 tens. Count back by tens from 594: 584, 574, 564, 554, 544, 534. So 594 − 60 = 534.
💡 How to solve: Mental Math: Adding & Subtracting
Use friendly numbers. To add 200, just add 2 to the hundreds digit: 345 + 200 = 545. To add 298, add 300 and then take away 2: 145 + 300 = 445, and 445 - 2 = 443. To make the next hundred, count up: 370 + 30 = 400.
Try a similar one
606 - 400 = ___
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 The blank is how much was taken away to go from 33 down to 19: 33 − 19 = 14. Check: 33 − 14 = 19.
✓ Correct!
Not quite. The answer is
💡 The blank is how much was taken away to go from 33 down to 19: 33 − 19 = 14. Check: 33 − 14 = 19.
💡 How to solve: Missing Numbers in Addition & Subtraction
Addition and subtraction undo each other. For 250 + ___ = 600, think 600 - 250 = 350, so the missing number is 350. For ___ - 40 = 85, add back: 85 + 40 = 125. Always check by putting your number back in.
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25 + ___ = 45
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 Ones: 4 is less than 8, so regroup 1 from the tens. Now 14 − 8 = 6. Tens: the 7 is now 6. 6 − 4 = 2. Hundreds: 9 − 7 = 2. So 974 − 748 = 226.
✓ Correct!
Not quite. The answer is
💡 Ones: 4 is less than 8, so regroup 1 from the tens. Now 14 − 8 = 6. Tens: the 7 is now 6. 6 − 4 = 2. Hundreds: 9 − 7 = 2. So 974 − 748 = 226.
💡 How to solve: 3-Digit Subtraction with Borrowing
Subtract one column at a time, starting with the ones. If the top digit is too small, borrow 1 from the next column. For 403 − 158: 3 is less than 8, and the tens hold 0, so borrow from the hundreds first: 4 hundreds become 3, the tens become 10, then borrow a ten: tens 9, ones 13. Now 13 − 8 = 5, 9 − 5 = 4, 3 − 1 = 2. So 403 − 158 = 245.
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861 − 549 = ___
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 47 rounds to 50, because the ones digit 7 is 5 or more, so round up. 21 rounds to 20, because the ones digit 1 is less than 5, so round down. Then 50 − 20 = 30. The answer is about 30.
✓ Correct!
Not quite. The answer is
💡 47 rounds to 50, because the ones digit 7 is 5 or more, so round up. 21 rounds to 20, because the ones digit 1 is less than 5, so round down. Then 50 − 20 = 30. The answer is about 30.
💡 How to solve: Estimating Sums & Differences
To estimate, round each number, then do the easy math. For 348 + 529, round to the nearest hundred: 300 + 500 = 800. So the answer is about 800. Estimating helps you check if an exact answer makes sense.
Try a similar one
Estimate 88 + 62 by rounding each number to the nearest ten.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 Ones: 9 + 9 = 18. Write 8 and carry 1 to the tens. Tens: 3 + 2 + 1 = 6. Hundreds: 2 + 2 = 4. So 239 + 229 = 468.
✓ Correct!
Not quite. The answer is
💡 Ones: 9 + 9 = 18. Write 8 and carry 1 to the tens. Tens: 3 + 2 + 1 = 6. Hundreds: 2 + 2 = 4. So 239 + 229 = 468.
💡 How to solve: Multi-Digit Addition & Subtraction (Mixed Review)
Line up the ones, tens and hundreds. Work from right to left, carrying when a column adds to 10 or more, and borrowing when the top digit is too small to subtract.
Try a similar one
178 + 130 = ___
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 Ones: 5 + 9 = 14. Write 4 and carry 1 to the tens. Tens: 1 + 7 + 1 = 9. Hundreds: 2 + 6 = 8. So 215 + 679 = 894.
✓ Correct!
Not quite. The answer is
💡 Ones: 5 + 9 = 14. Write 4 and carry 1 to the tens. Tens: 1 + 7 + 1 = 9. Hundreds: 2 + 6 = 8. So 215 + 679 = 894.
💡 How to solve: 3-Digit Addition with Regrouping
Add one column at a time, starting with the ones. For 368 + 257: ones 8 + 7 = 15, write 5 and carry 1 ten. Tens 6 + 5 + 1 = 12, write 2 and carry 1 hundred. Hundreds 3 + 2 + 1 = 6. So 368 + 257 = 625.
Try a similar one
814 + 179 = ___
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 Count up by tens from 50 to 100: that is 50. So 50 + 50 = 100.
✓ Correct!
Not quite. The answer is
💡 Count up by tens from 50 to 100: that is 50. So 50 + 50 = 100.
💡 How to solve: Mental Math: Adding & Subtracting
Use friendly numbers. To add 200, just add 2 to the hundreds digit: 345 + 200 = 545. To add 298, add 300 and then take away 2: 145 + 300 = 445, and 445 - 2 = 443. To make the next hundred, count up: 370 + 30 = 400.
Try a similar one
560 + 400 = ___
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
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Grade 3 Quiz: Addition & Subtraction — Easy Version 1
Answer every question. The lesson name before each question tells you which skill it checks — open that lesson if you need a reminder.