Subtraction | Subtracting Whole Numbers | MathHelp.com - By MathHelp.com
Transcript
| 00:0-1 | To subtract 985 -57 . 1st line up the numbers | |
| 00:06 | 985 minus 57 . So that the units digits are | |
| 00:13 | in the same column Notice . However that when we | |
| 00:16 | try to subtract the units digits we have 5 -7 | |
| 00:21 | . Since we can't subtract seven ones from five ones | |
| 00:24 | , we instead subtract seven ones from 15 ones . | |
| 00:28 | To do this , we borrow 1 10 from the | |
| 00:31 | tens column , leaving us with seven tens . The | |
| 00:36 | borrowed 10 is then added to the five ones , | |
| 00:40 | giving us 15 ones . Now subtracting in the units | |
| 00:45 | column 15 -7 is eight . In the 10th column | |
| 00:50 | 7 -5 is too and in the hundreds column 9 | |
| 00:55 | 0 is nine . So the difference between 985 and | |
| 01:00 | 57 is 928 . |
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