Subtraction of 3-digit numbers with regrouping are explained here with examples.
As you borrow from the tens column, you can also borrow from the hundred column.
Notice:
1 ten = 10 ones
1 hundred = 10 tens
Solved examples for subtracting 3-digit numbers with regrouping:
1. Subtract 674 – 458 Step I: Arrange the numbers vertically. Step II: Subtract the units column. Since 8> 4 and we cannot subtract 8 from 4, we regroup 7 tens and 4 ones. Well, 7 tens + 4 ones = 6 tens and 14 ones. 14 – 8 = 6 ones Step III: Subtract the tens column. 6 – 5 = 1 tens Step IV: Subtract the hundred column. 6 – 4 = 2 hundreds. |
So 674 – 458 = 216 |
2. Subtract 747 – 489.
Step I: Arrange the numbers vertically. Step II: Subtract the units column. Since 9> 7 and we can’t subtract 9 from 7, so we’re grouping 4 tens and 7s. Well, 4 tens + 7 ones = 3 tens and 17 ones. 17 – 9 = 8 ones Step III: Subtract the tens column. Since 1 tens is regrouped in units, we have 4 – 1 = 3 tens. We can’t subtract 8 from 3. So we group 7 hundreds and 3 tens. Well, 7 hundreds + 3 tens = 6 hundreds and 13 tens. 13 – 8 = 5 tens Step IV: Subtract the hundred column. 6 – 4 = 2 hundreds. |
So 747 – 489 = 258 |
I. Subtract the following:
(i) 625-56
(ii) 464-79
(iii) 552-88
(iv) 814-156
(v) 732-163
(vi) 406-387
(vii) 862-195
(viii) 608-125
(ix) 233-156
(x) 428-397
(xi) 786-397
(xii) 984-592
(xiii) 642-555
(xiv) 983-394
(xv) 437-157
(xvi) 840-800
II. Subtract the numbers:
(i) 235-67
(ii) 652-285
(iii) 447-285
(iv) 672-87
(v) 805-299
(vi) 844-666
(vii) 554-368
(viii) 422-173
(ix) 892-509
III. Enter the missing number. The first was done for you.
IV. Fill in the missing numbers:
3rd grade math class
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