Solution - Long subtraction
3.19
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths | hundredths |
| 7 | ||||
| - | 3 | . | 8 | 1 |
| . |
Put zeros in the blank number places:
| Place value | ones | . | tenths | hundredths |
| 7 | . | 0 | 0 | |
| - | 3 | . | 8 | 1 |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the hundredths column is too small to get a positive difference, borrow 1 from the number to the left (7.0) which becomes (6.9) and get (10).
| Place value | ones | . | tenths | hundredths |
| 6 | 9 | 10 | ||
| 7 | . | 0 | 0 | |
| - | 3 | . | 8 | 1 |
| . |
Subtract the numbers in the hundredths column from the top number:
10-0-1=9
| Place value | ones | . | tenths | hundredths |
| 6 | 9 | 10 | ||
| 7 | . | 0 | 0 | |
| - | 3 | . | 8 | 1 |
| . | 9 |
Subtract the numbers in the tenths column from the top number:
9-8=1
| Place value | ones | . | tenths | hundredths |
| 6 | 9 | 10 | ||
| 7 | . | 0 | 0 | |
| - | 3 | . | 8 | 1 |
| . | 1 | 9 |
Subtract the numbers in the ones column from the top number:
6-3=3
| Place value | ones | . | tenths | hundredths |
| 6 | 9 | 10 | ||
| 7 | . | 0 | 0 | |
| - | 3 | . | 8 | 1 |
| 3 | . | 1 | 9 |
The solution is: 3.19
How did we do?
Please leave us feedback.Why learn this
Why learn this