3 Digit Subtraction Worksheets - 15 Worksheets Library - Free Printable
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Step-by-step solution for: 3 Digit Subtraction Worksheets - 15 Worksheets Library
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Show Answer Key & Explanations
Step-by-step solution for: 3 Digit Subtraction Worksheets - 15 Worksheets Library
Here are the solutions to the subtraction problems, worked out step by step.
1) 912 - 445
* Ones place: $2 - 5$ needs borrowing. Borrow from the tens (1 becomes 0). $12 - 5 = 7$.
* Tens place: $0 - 4$ needs borrowing. Borrow from the hundreds (9 becomes 8). $10 - 4 = 6$.
* Hundreds place: $8 - 4 = 4$.
* Answer: 467
2) 729 - 324
* Ones place: $9 - 4 = 5$.
* Tens place: $2 - 2 = 0$.
* Hundreds place: $7 - 3 = 4$.
* Answer: 405
3) 513 - 513
* When you subtract a number from itself, the answer is always zero.
* Answer: 0
4) 866 - 488
* Ones place: $6 - 8$ needs borrowing. Borrow from tens (6 becomes 5). $16 - 8 = 8$.
* Tens place: $5 - 8$ needs borrowing. Borrow from hundreds (8 becomes 7). $15 - 8 = 7$.
* Hundreds place: $7 - 4 = 3$.
* Answer: 378
5) 893 - 801
* Ones place: $3 - 1 = 2$.
* Tens place: $9 - 0 = 9$.
* Hundreds place: $8 - 8 = 0$.
* Answer: 92
6) 920 - 123
* Ones place: $0 - 3$ needs borrowing. Borrow from tens (2 becomes 1). $10 - 3 = 7$.
* Tens place: $1 - 2$ needs borrowing. Borrow from hundreds (9 becomes 8). $11 - 2 = 9$.
* Hundreds place: $8 - 1 = 7$.
* Answer: 797
7) 900 - 484
* Ones place: $0 - 4$ needs borrowing. The tens is also 0, so borrow from hundreds (9 becomes 8). The tens becomes 10, then lend to ones (tens becomes 9, ones becomes 10). $10 - 4 = 6$.
* Tens place: $9 - 8 = 1$.
* Hundreds place: $8 - 4 = 4$.
* Answer: 416
8) 463 - 272
* Ones place: $3 - 2 = 1$.
* Tens place: $6 - 7$ needs borrowing. Borrow from hundreds (4 becomes 3). $16 - 7 = 9$.
* Hundreds place: $3 - 2 = 1$.
* Answer: 191
9) 889 - 247
* Ones place: $9 - 7 = 2$.
* Tens place: $8 - 4 = 4$.
* Hundreds place: $8 - 2 = 6$.
* Answer: 642
10) 838 - 752
* Ones place: $8 - 2 = 6$.
* Tens place: $3 - 5$ needs borrowing. Borrow from hundreds (8 becomes 7). $13 - 5 = 8$.
* Hundreds place: $7 - 7 = 0$.
* Answer: 86
11) 402 - 143
* Ones place: $2 - 3$ needs borrowing. Borrow from tens (which is 0), so borrow from hundreds (4 becomes 3). Tens becomes 10, then lends to ones (tens becomes 9, ones becomes 12). $12 - 3 = 9$.
* Tens place: $9 - 4 = 5$.
* Hundreds place: $3 - 1 = 2$.
* Answer: 259
12) 640 - 468
* Ones place: $0 - 8$ needs borrowing. Borrow from tens (4 becomes 3). $10 - 8 = 2$.
* Tens place: $3 - 6$ needs borrowing. Borrow from hundreds (6 becomes 5). $13 - 6 = 7$.
* Hundreds place: $5 - 4 = 1$.
* Answer: 172
13) 807 - 387
* Ones place: $7 - 7 = 0$.
* Tens place: $0 - 8$ needs borrowing. Borrow from hundreds (8 becomes 7). $10 - 8 = 2$.
* Hundreds place: $7 - 3 = 4$.
* Answer: 420
14) 593 - 410
* Ones place: $3 - 0 = 3$.
* Tens place: $9 - 1 = 8$.
* Hundreds place: $5 - 4 = 1$.
* Answer: 183
15) 355 - 113
* Ones place: $5 - 3 = 2$.
* Tens place: $5 - 1 = 4$.
* Hundreds place: $3 - 1 = 2$.
* Answer: 242
16) 878 - 649
* Ones place: $8 - 9$ needs borrowing. Borrow from tens (7 becomes 6). $18 - 9 = 9$.
* Tens place: $6 - 4 = 2$.
* Hundreds place: $8 - 6 = 2$.
* Answer: 229
17) 390 - 181
* Ones place: $0 - 1$ needs borrowing. Borrow from tens (9 becomes 8). $10 - 1 = 9$.
* Tens place: $8 - 8 = 0$.
* Hundreds place: $3 - 1 = 2$.
* Answer: 209
18) 572 - 529
* Ones place: $2 - 9$ needs borrowing. Borrow from tens (7 becomes 6). $12 - 9 = 3$.
* Tens place: $6 - 2 = 4$.
* Hundreds place: $5 - 5 = 0$.
* Answer: 43
Final Answer:
1) 467
2) 405
3) 0
4) 378
5) 92
6) 797
7) 416
8) 191
9) 642
10) 86
11) 259
12) 172
13) 420
14) 183
15) 242
16) 229
17) 209
18) 43
1) 912 - 445
* Ones place: $2 - 5$ needs borrowing. Borrow from the tens (1 becomes 0). $12 - 5 = 7$.
* Tens place: $0 - 4$ needs borrowing. Borrow from the hundreds (9 becomes 8). $10 - 4 = 6$.
* Hundreds place: $8 - 4 = 4$.
* Answer: 467
2) 729 - 324
* Ones place: $9 - 4 = 5$.
* Tens place: $2 - 2 = 0$.
* Hundreds place: $7 - 3 = 4$.
* Answer: 405
3) 513 - 513
* When you subtract a number from itself, the answer is always zero.
* Answer: 0
4) 866 - 488
* Ones place: $6 - 8$ needs borrowing. Borrow from tens (6 becomes 5). $16 - 8 = 8$.
* Tens place: $5 - 8$ needs borrowing. Borrow from hundreds (8 becomes 7). $15 - 8 = 7$.
* Hundreds place: $7 - 4 = 3$.
* Answer: 378
5) 893 - 801
* Ones place: $3 - 1 = 2$.
* Tens place: $9 - 0 = 9$.
* Hundreds place: $8 - 8 = 0$.
* Answer: 92
6) 920 - 123
* Ones place: $0 - 3$ needs borrowing. Borrow from tens (2 becomes 1). $10 - 3 = 7$.
* Tens place: $1 - 2$ needs borrowing. Borrow from hundreds (9 becomes 8). $11 - 2 = 9$.
* Hundreds place: $8 - 1 = 7$.
* Answer: 797
7) 900 - 484
* Ones place: $0 - 4$ needs borrowing. The tens is also 0, so borrow from hundreds (9 becomes 8). The tens becomes 10, then lend to ones (tens becomes 9, ones becomes 10). $10 - 4 = 6$.
* Tens place: $9 - 8 = 1$.
* Hundreds place: $8 - 4 = 4$.
* Answer: 416
8) 463 - 272
* Ones place: $3 - 2 = 1$.
* Tens place: $6 - 7$ needs borrowing. Borrow from hundreds (4 becomes 3). $16 - 7 = 9$.
* Hundreds place: $3 - 2 = 1$.
* Answer: 191
9) 889 - 247
* Ones place: $9 - 7 = 2$.
* Tens place: $8 - 4 = 4$.
* Hundreds place: $8 - 2 = 6$.
* Answer: 642
10) 838 - 752
* Ones place: $8 - 2 = 6$.
* Tens place: $3 - 5$ needs borrowing. Borrow from hundreds (8 becomes 7). $13 - 5 = 8$.
* Hundreds place: $7 - 7 = 0$.
* Answer: 86
11) 402 - 143
* Ones place: $2 - 3$ needs borrowing. Borrow from tens (which is 0), so borrow from hundreds (4 becomes 3). Tens becomes 10, then lends to ones (tens becomes 9, ones becomes 12). $12 - 3 = 9$.
* Tens place: $9 - 4 = 5$.
* Hundreds place: $3 - 1 = 2$.
* Answer: 259
12) 640 - 468
* Ones place: $0 - 8$ needs borrowing. Borrow from tens (4 becomes 3). $10 - 8 = 2$.
* Tens place: $3 - 6$ needs borrowing. Borrow from hundreds (6 becomes 5). $13 - 6 = 7$.
* Hundreds place: $5 - 4 = 1$.
* Answer: 172
13) 807 - 387
* Ones place: $7 - 7 = 0$.
* Tens place: $0 - 8$ needs borrowing. Borrow from hundreds (8 becomes 7). $10 - 8 = 2$.
* Hundreds place: $7 - 3 = 4$.
* Answer: 420
14) 593 - 410
* Ones place: $3 - 0 = 3$.
* Tens place: $9 - 1 = 8$.
* Hundreds place: $5 - 4 = 1$.
* Answer: 183
15) 355 - 113
* Ones place: $5 - 3 = 2$.
* Tens place: $5 - 1 = 4$.
* Hundreds place: $3 - 1 = 2$.
* Answer: 242
16) 878 - 649
* Ones place: $8 - 9$ needs borrowing. Borrow from tens (7 becomes 6). $18 - 9 = 9$.
* Tens place: $6 - 4 = 2$.
* Hundreds place: $8 - 6 = 2$.
* Answer: 229
17) 390 - 181
* Ones place: $0 - 1$ needs borrowing. Borrow from tens (9 becomes 8). $10 - 1 = 9$.
* Tens place: $8 - 8 = 0$.
* Hundreds place: $3 - 1 = 2$.
* Answer: 209
18) 572 - 529
* Ones place: $2 - 9$ needs borrowing. Borrow from tens (7 becomes 6). $12 - 9 = 3$.
* Tens place: $6 - 2 = 4$.
* Hundreds place: $5 - 5 = 0$.
* Answer: 43
Final Answer:
1) 467
2) 405
3) 0
4) 378
5) 92
6) 797
7) 416
8) 191
9) 642
10) 86
11) 259
12) 172
13) 420
14) 183
15) 242
16) 229
17) 209
18) 43
Parent Tip: Review the logic above to help your child master the concept of triple digit subtraction worksheet.
