2nd Grade Adding and Subtracting Within 1,000 Worksheet Solutions (PDF)
This grade 2 add subtract 1000 answers for 2nd Grade covers adding and subtracting within 1,000 (Common Core 2.NBT.B.7, 2.NBT.B.8), with a free PDF to print.
Grade 2 · Common Core State Standards: 2.NBT.B.7, 2.NBT.B.8
Grade 2 add subtract 1000 answers: exercises 1 to 10
Exercise 1 – Ladder of tens
Adding 10 raises the tens digit by 1: 347 has 4 tens, so the next number has 5 tens.
\(347 + 10 = 357\) and \(357 + 10 = 367\).
\(357 and 367\)
Exercise 2 – Subtract 100
Subtracting 100 lowers the hundreds digit by 1: 5 hundreds becomes 4 hundreds. The tens and ones stay the same.
\(584 – 100 = 484\)
Exercise 3 – Add 100
Add 1 to the hundreds digit: 6 hundreds becomes 7 hundreds.
\(629 + 100 = 729\)
Exercise 4 – Subtract 10
405 has 0 tens. Take 1 ten from 40 tens to get 39 tens, so the hundreds digit also changes: 4 hundreds 0 tens becomes 3 hundreds 9 tens.
\(405 – 10 = 395\)
Exercise 5 – Add 10 and cross a hundred
392 has 9 tens. One more ten makes 10 tens, which is 1 hundred. So 3 hundreds 9 tens 2 ones becomes 4 hundreds 0 tens 2 ones.
\(392 + 10 = 402\)
Exercise 6 – Add with blocks
Ones: \(1 + 6 = 7\).
Tens: \(4 + 5 = 9\).
Hundreds: \(2 + 3 = 5\).
So \(241 + 356 = 597\).
\(597\)
Exercise 7 – Regroup the ones
Ones: \(4 + 8 = 12\). Regroup 10 ones as 1 ten, and keep 2 ones.
Tens: \(3 + 5 + 1 = 9\).
Hundreds: \(1 + 1 = 2\).
So \(134 + 158 = 292\).
\(292\)
Exercise 8 – Regroup the tens
Ones: \(2 + 4 = 6\).
Tens: \(7 + 6 = 13\). Regroup 10 tens as 1 hundred, and keep 3 tens.
Hundreds: \(3 + 2 + 1 = 6\).
So \(372 + 264 = 636\).
\(636\)
Exercise 9 – Regroup two times
Ones: \(6 + 5 = 11\). Regroup 10 ones as 1 ten, and keep 1 ones.
Tens: \(7 + 8 + 1 = 16\). Regroup 10 tens as 1 hundred, and keep 6 tens.
Hundreds: \(2 + 3 + 1 = 6\).
So \(276 + 385 = 661\).
\(661\)
Exercise 10 – Subtract each place
Write 748 as 7 hundreds, 4 tens, 8 ones.
Ones: \(8 – 5 = 3\).
Tens: \(4 – 2 = 2\).
Hundreds: \(7 – 3 = 4\).
So \(748 – 325 = 423\).
\(423\)
Exercises 11 and up
Exercise 11 – Trade a ten
Write 536 as 5 hundreds, 3 tens, 6 ones.
Not enough ones. Trade 1 ten for 10 ones. Now: 5 hundreds, 2 tens, 16 ones.
Ones: \(16 – 8 = 8\).
Not enough tens. Trade 1 hundred for 10 tens. Now: 4 hundreds, 12 tens, 16 ones.
Tens: \(12 – 7 = 5\).
Hundreds: \(4 – 1 = 3\).
So \(536 – 178 = 358\).
\(358\)
Exercise 12 – Trade a hundred
Write 625 as 6 hundreds, 2 tens, 5 ones.
Ones: \(5 – 2 = 3\).
Not enough tens. Trade 1 hundred for 10 tens. Now: 5 hundreds, 12 tens, 5 ones.
Tens: \(12 – 4 = 8\).
Hundreds: \(5 – 3 = 2\).
So \(625 – 342 = 283\).
\(283\)
Exercise 13 – Zero in the tens place
Write 403 as 4 hundreds, 0 tens, 3 ones.
Not enough ones. Trade 1 hundred for 10 tens. Now: 3 hundreds, 10 tens, 3 ones.
Not enough ones. Trade 1 ten for 10 ones. Now: 3 hundreds, 9 tens, 13 ones.
Ones: \(13 – 8 = 5\).
Tens: \(9 – 5 = 4\).
Hundreds: \(3 – 1 = 2\).
So \(403 – 158 = 245\).
\(245\)
Exercise 14 – Missing addend
Subtract the known part from the whole: \(612 – 347\).
Write 612 as 6 hundreds, 1 ten, 2 ones.
Not enough ones. Trade 1 ten for 10 ones. Now: 6 hundreds, 0 tens, 12 ones.
Ones: \(12 – 7 = 5\).
Not enough tens. Trade 1 hundred for 10 tens. Now: 5 hundreds, 10 tens, 12 ones.
Tens: \(10 – 4 = 6\).
Hundreds: \(5 – 3 = 2\).
So \(612 – 347 = 265\).
Check: \(347 + 265 = 612\).
\(265\)
Exercise 15 – Check with addition
Write 815 as 8 hundreds, 1 ten, 5 ones.
Not enough ones. Trade 1 ten for 10 ones. Now: 8 hundreds, 0 tens, 15 ones.
Ones: \(15 – 7 = 8\).
Not enough tens. Trade 1 hundred for 10 tens. Now: 7 hundreds, 10 tens, 15 ones.
Tens: \(10 – 6 = 4\).
Hundreds: \(7 – 4 = 3\).
So \(815 – 467 = 348\).
Check: \(348 + 467 = 815\). It matches.
\(348\)
Exercise 16 – Find the error
Noah took the smaller digit from the larger digit in each place: \(9 – 4 = 5\), \(7 – 2 = 5\), \(5 – 2 = 3\). But 4 ones cannot be used to take away 9 ones, so he needed to trade.
Write 524 as 5 hundreds, 2 tens, 4 ones.
Not enough ones. Trade 1 ten for 10 ones. Now: 5 hundreds, 1 ten, 14 ones.
Ones: \(14 – 9 = 5\).
Not enough tens. Trade 1 hundred for 10 tens. Now: 4 hundreds, 11 tens, 14 ones.
Tens: \(11 – 7 = 4\).
Hundreds: \(4 – 2 = 2\).
So \(524 – 279 = 245\).
Check: \(245 + 279 = 524\).
\(245\)
Exercise 17 – Bottle caps
Add: \(326 + 145\).
Ones: \(6 + 5 = 11\). Regroup 10 ones as 1 ten, and keep 1 ones.
Tens: \(2 + 4 + 1 = 7\).
Hundreds: \(3 + 1 = 4\).
So \(326 + 145 = 471\).
Sofia has 471 bottle caps.
Exercise 18 – Library shelf
Find the missing part: \(705 – 268\).
Write 705 as 7 hundreds, 0 tens, 5 ones.
Not enough ones. Trade 1 hundred for 10 tens. Now: 6 hundreds, 10 tens, 5 ones.
Not enough ones. Trade 1 ten for 10 ones. Now: 6 hundreds, 9 tens, 15 ones.
Ones: \(15 – 8 = 7\).
Tens: \(9 – 6 = 3\).
Hundreds: \(6 – 2 = 4\).
So \(705 – 268 = 437\).
437 books are still on the shelf.
Exercise 19 – Road trip
Add: \(287 + 356\).
Ones: \(7 + 6 = 13\). Regroup 10 ones as 1 ten, and keep 3 ones.
Tens: \(8 + 5 + 1 = 14\). Regroup 10 tens as 1 hundred, and keep 4 tens.
Hundreds: \(2 + 3 + 1 = 6\).
So \(287 + 356 = 643\).
They drove 643 miles.
Exercise 20 – Game points
First add: \(450 + 175\).
Ones: \(0 + 5 = 5\).
Tens: \(5 + 7 = 12\). Regroup 10 tens as 1 hundred, and keep 2 tens.
Hundreds: \(4 + 1 + 1 = 6\).
So \(450 + 175 = 625\).
Then subtract: \(625 – 220\).
Write 625 as 6 hundreds, 2 tens, 5 ones.
Ones: \(5 – 0 = 5\).
Tens: \(2 – 2 = 0\).
Hundreds: \(6 – 2 = 4\).
So \(625 – 220 = 405\).
Ethan has 405 points.
Exercise 21 – Ticket sales
Saturday: \(238 + 100 = 338\). Add 1 to the hundreds digit.
Sunday: \(338 – 10 = 328\). Take 1 from the tens digit.
Sunday sold 328 tickets.
Exercise 22 – Tomatoes and peppers
(a) \(512 – 387\):
Write 512 as 5 hundreds, 1 ten, 2 ones.
Not enough ones. Trade 1 ten for 10 ones. Now: 5 hundreds, 0 tens, 12 ones.
Ones: \(12 – 7 = 5\).
Not enough tens. Trade 1 hundred for 10 tens. Now: 4 hundreds, 10 tens, 12 ones.
Tens: \(10 – 8 = 2\).
Hundreds: \(4 – 3 = 1\).
So \(512 – 387 = 125\).
(b) \(512 + 387\): \(2 + 7 = 9\), \(1 + 8 = 9\), \(5 + 3 = 8\), so 899.
(a) 125 more tomatoes. (b) 899 in all.
Key facts behind this grade 2 add subtract 1000 answers
- Add and subtract ones first, then tens, then hundreds.
- 10 ones make 1 ten and 10 tens make 1 hundred.
- Trade a ten or a hundred when a place does not have enough to subtract.
- Adding or subtracting 10 changes only the tens digit.
- Adding or subtracting 100 changes only the hundreds digit.
How to use this grade 2 add subtract 1000 answers
Cover each solution, solve the exercise again, then uncover it and compare every line. If your answer differs, find the first step that changed and redo the exercise from there.
Download the grade 2 add subtract 1000 answers as a PDF with the button below and keep it with your notes.
Download the grade 2 add subtract 1000 answers as a PDF with the button below and keep it with your notes.
Download the grade 2 add subtract 1000 answers as a PDF with the button below and keep it with your notes.
Download the grade 2 add subtract 1000 answers as a PDF with the button below and keep it with your notes.
Download the grade 2 add subtract 1000 answers as a PDF with the button below and keep it with your notes.
All Grade 2 chapters: Grade 2 math.
