Solution - Long subtraction
1.4
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 8 | . | 9 | 9 | |
| - | 1 | 7 | . | 5 | 9 |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the hundredths column from the top number:
9-9=0
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 8 | . | 9 | 9 | |
| - | 1 | 7 | . | 5 | 9 |
| . | 0 |
Subtract the numbers in the tenths column from the top number:
9-5=4
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 8 | . | 9 | 9 | |
| - | 1 | 7 | . | 5 | 9 |
| . | 4 | 0 |
Subtract the numbers in the ones column from the top number:
8-7=1
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 8 | . | 9 | 9 | |
| - | 1 | 7 | . | 5 | 9 |
| 1 | . | 4 | 0 |
Subtract the numbers in the tens column from the top number:
1-1=0
| Place value | tens | ones | . | tenths | hundredths |
| 1 | 8 | . | 9 | 9 | |
| - | 1 | 7 | . | 5 | 9 |
| 0 | 1 | . | 4 | 0 |
The solution is: 1.4
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