This grade 4 add worksheet answer key solves all 23 problems of the adding and subtracting multi-digit numbers worksheet step by step.
Every solution below shows the regrouping column by column and ends with the final answer in bold. Compare your own work step by step, and use the addition check to find where a slip happened if your answer is different from the key.
Grade 4 Add Worksheet Answer Key: problems 1–5
Problem 1: Add without regrouping
Add each place from the ones: 4 + 3 = 7 ones, 1 + 7 = 8 tens, 2 + 5 = 7 hundreds, 3 + 4 = 7 thousands.
\(3{,}214 + 4{,}573 = 7{,}787\). Answer: 7,787
Problem 2: Add with regrouping
Ones: 8 + 7 = 15, write 5 and regroup 1 ten. Tens: 6 + 5 + 1 = 12, write 2 and regroup 1 hundred. Hundreds: 4 + 3 + 1 = 8. Thousands: 2 + 1 = 3.
Answer: 3,825
Problem 3: Add with three regroupings
Ones: 9 + 6 = 15, write 5, regroup 1. Tens: 8 + 4 + 1 = 13, write 3, regroup 1. Hundreds: 7 + 8 + 1 = 16, write 6, regroup 1. Thousands: 5 + 2 + 1 = 8.
\(5{,}789 + 2{,}846 = 8{,}635\). Answer: 8,635
Problem 4: Add five-digit numbers
Ones: 2 + 9 = 11, write 1, regroup 1. Tens: 8 + 5 + 1 = 14, write 4, regroup 1. Hundreds: 4 + 7 + 1 = 12, write 2, regroup 1. Thousands: 6 + 7 + 1 = 14, write 4, regroup 1. Ten thousands: 3 + 2 + 1 = 6.
Answer: 64,241
Problem 5: Add six-digit numbers
Ones: 5 + 6 = 11, write 1. Tens: 1 + 8 + 1 = 10, write 0. Hundreds: 6 + 3 + 1 = 10, write 0. Thousands: 8 + 9 + 1 = 18, write 8. Ten thousands: 4 + 7 + 1 = 12, write 2. Hundred thousands: 2 + 1 + 1 = 4.
Answer: 428,001
Grade 4 Add Worksheet Answer Key: problems 6–10
Problem 6: Subtract without regrouping
Ones: 6 − 4 = 2. Tens: 9 − 2 = 7. Hundreds: 8 − 5 = 3. Thousands: 7 − 3 = 4.
Check: \(4{,}372 + 3{,}524 = 7{,}896\). Answer: 4,372
Problem 7: Subtract with regrouping
Ones: 1 is less than 9, so regroup 1 ten as 10 ones: 11 − 9 = 2. Tens: 5 tens became 4 tens, and 4 − 2 = 2. Hundreds: 4 is less than 7, so regroup 1 thousand as 10 hundreds: 14 − 7 = 7. Thousands: 6 became 5, and 5 − 2 = 3.
Check: \(3{,}722 + 2{,}729 = 6{,}451\). Answer: 3,722
Problem 8: Subtract with several regroupings
Ones: 3 is less than 7, and the tens digit is 0. Regroup from the hundreds: 2 hundreds become 1 hundred and 10 tens, then 1 ten becomes 10 ones. Ones: 13 − 7 = 6. Tens: 9 − 6 = 3. Hundreds: 1 is less than 5, so regroup 1 thousand: 11 − 5 = 6. Thousands: 7 − 4 = 3.
Answer: 3,636
Problem 9: Subtract across zeros
Regroup 1 thousand as 10 hundreds, 1 hundred as 10 tens, and 1 ten as 10 ones. The top number becomes 4 thousands, 9 hundreds, 9 tens, and 10 ones. Subtract: 10 − 6 = 4, 9 − 7 = 2, 9 − 3 = 6, 4 − 2 = 2.
Check: \(2{,}624 + 2{,}376 = 5{,}000\). Answer: 2,624
Problem 10: Subtract six-digit numbers
Regroup across the zeros: the top number becomes 4 hundred thousands, 4 ten thousands, 9 thousands, 9 hundreds, 9 tens, and 10 ones. Ones: 10 − 4 = 6. Tens: 9 − 6 = 3. Hundreds: 9 − 7 = 2. Thousands: 9 − 8 = 1. Ten thousands: 4 − 2 = 2. Hundred thousands: 4 − 1 = 3.
Check: \(321{,}236 + 128{,}764 = 450{,}000\). Answer: 321,236
Grade 4 Add Worksheet Answer Key: problems 11–15
Problem 11: Find the missing addend
Subtract the known addend from the total: \(7{,}031 – 2{,}486 = 4{,}545\).
Check: \(4{,}545 + 2{,}486 = 7{,}031\). Answer: 4,545
Problem 12: Check by adding
Check: \(5{,}643 + 3{,}457\) = \(9{,}100\), which is not \(9{,}000\). So her answer is wrong.
Correct subtraction: \(9{,}000 – 3{,}457 = 5{,}543\). Check: \(5{,}543 + 3{,}457 = 9{,}000\). Answer: No; the correct difference is 5,543
Problem 13: Find the mistake in addition
Jamal never regrouped. In the ones, 8 + 5 = 13, so he should write 3 and regroup 1 ten; he dropped the 1. The same happened in the tens (7 + 4 = 11) and the hundreds (6 + 5 = 11).
Answer: 8,223
Problem 14: Add three numbers
First, \(12{,}408 + 3{,}596 = 16{,}004\). Then \(16{,}004 + 25{,}731 = 41{,}735\).
Answer: 41,735
Problem 15: Compare sums and differences
\(6{,}308 + 2{,}795 = 9{,}103\) and \(10{,}000 – 891 = 9{,}109\).
Since \(9{,}103\) is less than \(9{,}109\), the answer is <.
Grade 4 Add Worksheet Answer Key: problems 16–20
Problem 16: Little League tickets
Add the parts: \(1{,}248 + 1{,}375 = 2{,}623\).
Answer: 2,623 tickets
Problem 17: Road trip miles left
Subtract the part from the whole: \(2{,}845 – 1{,}978 = 867\).
Answer: 867 miles
Problem 18: Bake sale budget
\(\$12{,}475 – \$4{,}868 = \$7{,}607\). Check: 7,607 + 4,868 = 12,475.
Answer: $7,607
Problem 19: Two towns
(a) \(48{,}305 – 36{,}478 = 11{,}827\).
(b) \(48{,}305 + 36{,}478 = 84{,}783\).
Answer: (a) 11,827 people; (b) 84,783 people
Problem 20: Farmers market apples
\(2{,}364 + 1{,}897 = 4{,}261\). Then \(4{,}261 + 3{,}058 = 7{,}319\).
Answer: 7,319 pounds
Grade 4 Add Worksheet Answer Key: problems 21–23
Problem 21: Stadium crowds
(a) Friday: \(52{,}000 – 38{,}645 = 13{,}355\). Saturday: \(52{,}000 – 47{,}298 = 4{,}702\).
(b) \(47{,}298 – 38{,}645 = 8{,}653\).
Answer: (a) 13,355 and 4,702 empty seats; (b) 8,653 more fans
Problem 22: Library books
After Monday: \(15{,}200 – 3{,}486 = 11{,}714\). After Tuesday: \(11{,}714 + 2{,}719 = 14{,}433\).
Answer: 14,433 books
Problem 23: Video views goal
Views so far: \(34{,}568 + 29{,}745 = 64{,}313\). Views needed: \(100{,}000 – 64{,}313 = 35{,}687\).
Check: \(35{,}687 + 64{,}313 = 100{,}000\). Answer: 35,687 views
How to use this grade 4 add worksheet answer key
Read this grade 4 add worksheet answer key after trying each problem yourself, and redo any problem you missed.
See every chapter on the Grade 4 math page.