Math worksheet for practicing addition and subtraction of large numbers.
Worksheet titled "Adding and Subtracting Large Numbers" with eight math problems involving addition and subtraction of large numbers, including spaces for name, date, and score, and the Math Monks logo.
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Show Answer Key & Explanations
Step-by-step solution for: Addition and Subtraction Worksheets with Answer Key
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Show Answer Key & Explanations
Step-by-step solution for: Addition and Subtraction Worksheets with Answer Key
Let’s solve each problem step by step. We’ll add or subtract the numbers carefully, aligning digits by place value (ones, tens, hundreds, etc.). I’ll double-check each calculation before writing the final answer.
---
Problem 1:
5,134,178
+ 524,227
= ?
Add from right to left:
- 8 + 7 = 15 → write 5, carry 1
- 7 + 2 + 1 = 10 → write 0, carry 1
- 1 + 2 + 1 = 4
- 4 + 4 = 8
- 3 + 2 = 5
- 1 + 5 = 6
- 5 + 0 = 5
→ 5,658,405
Check: 5,134,178 + 524,227 = 5,658,405 ✔
---
Problem 2:
84,461,654
+ 74,142
= ?
Align properly:
84,461,654
+ 74,142
= ?
Start from right:
- 4 + 2 = 6
- 5 + 4 = 9
- 6 + 1 = 7
- 1 + 4 = 5
- 6 + 7 = 13 → write 3, carry 1
- 4 + 0 + 1 = 5
- 4 + 0 = 4
- 8 + 0 = 8
→ 84,535,796
Check: 84,461,654 + 74,142 = 84,535,796 ✔
---
Problem 3:
67,644,194
– 48,730,160
= ?
Subtract digit by digit from right:
- 4 – 0 = 4
- 9 – 6 = 3
- 1 – 1 = 0
- 4 – 0 = 4
- 4 – 3 = 1
- 6 – 7 → can’t do! Borrow from next digit.
Wait — let’s line it up:
67,644,194
– 48,730,160
= ?
From right:
- 4 – 0 = 4
- 9 – 6 = 3
- 1 – 1 = 0
- 4 – 0 = 4
- 4 – 3 = 1
- 6 – 7 → need to borrow. The 7 in ten-millions becomes 6, and the 6 in millions becomes 16.
So: 16 – 7 = 9
Then: 6 (after borrowing) – 8 → again, need to borrow. The 6 in hundred-millions? Wait — actually, 67 million minus 48 million.
Better to think:
67,644,194
–48,730,160
= ?
Do column subtraction with borrowing:
Millions place: 67 – 48 = 19? But we have more digits.
Actually, let's compute directly:
67,644,194
–48,730,160
= 18,914,034
Check: 48,730,160 + 18,914,034 = 67,644,194 ✔
Yes:
48,730,160
+18,914,034
= 67,644,194 ✔️
→ 18,914,034
---
Problem 4:
75,101,217
+ 37,009,019
= ?
Add:
- 7 + 9 = 16 → write 6, carry 1
- 1 + 1 + 1 = 3
- 2 + 0 = 2
- 1 + 9 = 10 → write 0, carry 1
- 0 + 0 + 1 = 1
- 1 + 7 = 8
- 5 + 3 = 8
- 7 + 0 = 7
Wait — let’s align:
75,101,217
+ 37,009,019
= ?
Right to left:
- 7 + 9 = 16 → 6, carry 1
- 1 + 1 + 1 = 3
- 2 + 0 = 2
- 1 + 9 = 10 → 0, carry 1
- 0 + 0 + 1 = 1
- 1 + 7 = 8
- 5 + 3 = 8
- 7 + 0 = 7? Wait — 75 million + 37 million = 112 million?
Actually:
75,101,217
+37,009,019
= 112,110,236
Check:
75,101,217
+37,009,019
= 112,110,236 ✔
Breakdown:
75M + 37M = 112M
101,217 + 9,019 = 110,236
Total: 112,110,236
→ 112,110,236
---
Problem 5:
916,420
+ 6,955
= ?
Align:
916,420
+ 6,955
= ?
Right to left:
- 0 + 5 = 5
- 2 + 5 = 7
- 4 + 9 = 13 → write 3, carry 1
- 6 + 6 + 1 = 13 → write 3, carry 1
- 1 + 0 + 1 = 2
- 9 + 0 = 9
→ 923,375
Check: 916,420 + 6,955 = 923,375 ✔
---
Problem 6:
10,293,766
+ 38,281,838
= ?
Add:
- 6 + 8 = 14 → 4, carry 1
- 6 + 3 + 1 = 10 → 0, carry 1
- 7 + 8 + 1 = 16 → 6, carry 1
- 3 + 1 + 1 = 5
- 9 + 8 = 17 → 7, carry 1
- 2 + 2 + 1 = 5
- 0 + 8 = 8
- 1 + 3 = 4
Wait — let’s write:
10,293,766
+ 38,281,838
= ?
Actually:
10,293,766
+38,281,838
= 48,575,604
Check:
10,293,766
+38,281,838
= 48,575,604 ✔
Breakdown:
10M + 38M = 48M
293,766 + 281,838 = 575,604
Total: 48,575,604
→ 48,575,604
---
Problem 7:
91,935,443
+ 4,934,528
= ?
Add:
- 3 + 8 = 11 → 1, carry 1
- 4 + 2 + 1 = 7
- 4 + 5 = 9
- 5 + 4 = 9
- 3 + 3 = 6
- 9 + 9 = 18 → 8, carry 1
- 1 + 4 + 1 = 6
- 9 + 0 = 9
Wait — better:
91,935,443
+ 4,934,528
= ?
Actually:
91,935,443
+ 4,934,528
= 96,869,971
Check:
91,935,443
+ 4,934,528
= 96,869,971 ✔
Breakdown:
91M + 4M = 95M? Wait no — 91,935,443 is about 92M, plus ~5M = ~97M.
Compute:
91,935,443
+ 4,934,528
= 96,869,971 ✔️
→ 96,869,971
---
Problem 8:
6,134,275
+ 624,228
= ?
Add:
- 5 + 8 = 13 → 3, carry 1
- 7 + 2 + 1 = 10 → 0, carry 1
- 2 + 2 + 1 = 5
- 4 + 4 = 8
- 3 + 2 = 5
- 1 + 6 = 7
- 6 + 0 = 6
→ 6,758,503
Check: 6,134,275 + 624,228 = 6,758,503 ✔
---
Final Answers:
1. 5,658,405
2. 84,535,796
3. 18,914,034
4. 112,110,236
5. 923,375
6. 48,575,604
7. 96,869,971
8. 6,758,503
──────────────────────────────────────
Final Answer:
1. 5,658,405
2. 84,535,796
3. 18,914,034
4. 112,110,236
5. 923,375
6. 48,575,604
7. 96,869,971
8. 6,758,503
---
Problem 1:
5,134,178
+ 524,227
= ?
Add from right to left:
- 8 + 7 = 15 → write 5, carry 1
- 7 + 2 + 1 = 10 → write 0, carry 1
- 1 + 2 + 1 = 4
- 4 + 4 = 8
- 3 + 2 = 5
- 1 + 5 = 6
- 5 + 0 = 5
→ 5,658,405
Check: 5,134,178 + 524,227 = 5,658,405 ✔
---
Problem 2:
84,461,654
+ 74,142
= ?
Align properly:
84,461,654
+ 74,142
= ?
Start from right:
- 4 + 2 = 6
- 5 + 4 = 9
- 6 + 1 = 7
- 1 + 4 = 5
- 6 + 7 = 13 → write 3, carry 1
- 4 + 0 + 1 = 5
- 4 + 0 = 4
- 8 + 0 = 8
→ 84,535,796
Check: 84,461,654 + 74,142 = 84,535,796 ✔
---
Problem 3:
67,644,194
– 48,730,160
= ?
Subtract digit by digit from right:
- 4 – 0 = 4
- 9 – 6 = 3
- 1 – 1 = 0
- 4 – 0 = 4
- 4 – 3 = 1
- 6 – 7 → can’t do! Borrow from next digit.
Wait — let’s line it up:
67,644,194
– 48,730,160
= ?
From right:
- 4 – 0 = 4
- 9 – 6 = 3
- 1 – 1 = 0
- 4 – 0 = 4
- 4 – 3 = 1
- 6 – 7 → need to borrow. The 7 in ten-millions becomes 6, and the 6 in millions becomes 16.
So: 16 – 7 = 9
Then: 6 (after borrowing) – 8 → again, need to borrow. The 6 in hundred-millions? Wait — actually, 67 million minus 48 million.
Better to think:
67,644,194
–48,730,160
= ?
Do column subtraction with borrowing:
Millions place: 67 – 48 = 19? But we have more digits.
Actually, let's compute directly:
67,644,194
–48,730,160
= 18,914,034
Check: 48,730,160 + 18,914,034 = 67,644,194 ✔
Yes:
48,730,160
+18,914,034
= 67,644,194 ✔️
→ 18,914,034
---
Problem 4:
75,101,217
+ 37,009,019
= ?
Add:
- 7 + 9 = 16 → write 6, carry 1
- 1 + 1 + 1 = 3
- 2 + 0 = 2
- 1 + 9 = 10 → write 0, carry 1
- 0 + 0 + 1 = 1
- 1 + 7 = 8
- 5 + 3 = 8
- 7 + 0 = 7
Wait — let’s align:
75,101,217
+ 37,009,019
= ?
Right to left:
- 7 + 9 = 16 → 6, carry 1
- 1 + 1 + 1 = 3
- 2 + 0 = 2
- 1 + 9 = 10 → 0, carry 1
- 0 + 0 + 1 = 1
- 1 + 7 = 8
- 5 + 3 = 8
- 7 + 0 = 7? Wait — 75 million + 37 million = 112 million?
Actually:
75,101,217
+37,009,019
= 112,110,236
Check:
75,101,217
+37,009,019
= 112,110,236 ✔
Breakdown:
75M + 37M = 112M
101,217 + 9,019 = 110,236
Total: 112,110,236
→ 112,110,236
---
Problem 5:
916,420
+ 6,955
= ?
Align:
916,420
+ 6,955
= ?
Right to left:
- 0 + 5 = 5
- 2 + 5 = 7
- 4 + 9 = 13 → write 3, carry 1
- 6 + 6 + 1 = 13 → write 3, carry 1
- 1 + 0 + 1 = 2
- 9 + 0 = 9
→ 923,375
Check: 916,420 + 6,955 = 923,375 ✔
---
Problem 6:
10,293,766
+ 38,281,838
= ?
Add:
- 6 + 8 = 14 → 4, carry 1
- 6 + 3 + 1 = 10 → 0, carry 1
- 7 + 8 + 1 = 16 → 6, carry 1
- 3 + 1 + 1 = 5
- 9 + 8 = 17 → 7, carry 1
- 2 + 2 + 1 = 5
- 0 + 8 = 8
- 1 + 3 = 4
Wait — let’s write:
10,293,766
+ 38,281,838
= ?
Actually:
10,293,766
+38,281,838
= 48,575,604
Check:
10,293,766
+38,281,838
= 48,575,604 ✔
Breakdown:
10M + 38M = 48M
293,766 + 281,838 = 575,604
Total: 48,575,604
→ 48,575,604
---
Problem 7:
91,935,443
+ 4,934,528
= ?
Add:
- 3 + 8 = 11 → 1, carry 1
- 4 + 2 + 1 = 7
- 4 + 5 = 9
- 5 + 4 = 9
- 3 + 3 = 6
- 9 + 9 = 18 → 8, carry 1
- 1 + 4 + 1 = 6
- 9 + 0 = 9
Wait — better:
91,935,443
+ 4,934,528
= ?
Actually:
91,935,443
+ 4,934,528
= 96,869,971
Check:
91,935,443
+ 4,934,528
= 96,869,971 ✔
Breakdown:
91M + 4M = 95M? Wait no — 91,935,443 is about 92M, plus ~5M = ~97M.
Compute:
91,935,443
+ 4,934,528
= 96,869,971 ✔️
→ 96,869,971
---
Problem 8:
6,134,275
+ 624,228
= ?
Add:
- 5 + 8 = 13 → 3, carry 1
- 7 + 2 + 1 = 10 → 0, carry 1
- 2 + 2 + 1 = 5
- 4 + 4 = 8
- 3 + 2 = 5
- 1 + 6 = 7
- 6 + 0 = 6
→ 6,758,503
Check: 6,134,275 + 624,228 = 6,758,503 ✔
---
Final Answers:
1. 5,658,405
2. 84,535,796
3. 18,914,034
4. 112,110,236
5. 923,375
6. 48,575,604
7. 96,869,971
8. 6,758,503
──────────────────────────────────────
Final Answer:
1. 5,658,405
2. 84,535,796
3. 18,914,034
4. 112,110,236
5. 923,375
6. 48,575,604
7. 96,869,971
8. 6,758,503
Parent Tip: Review the logic above to help your child master the concept of addition worksheet large numbers.
