Solution - Long subtraction
170920.459
Step-by-step explanation
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 9 | 5 | 9 | 2 | 0 | . | 4 | 5 | 9 | |
| - | 1 | 2 | 5 | 0 | 0 | 0 | ||||
| . |
Put zeros in the blank number places:
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 9 | 5 | 9 | 2 | 0 | . | 4 | 5 | 9 | |
| - | 1 | 2 | 5 | 0 | 0 | 0 | . | 0 | 0 | 0 |
| . |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the thousandths column from the top number:
9-0=9
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 9 | 5 | 9 | 2 | 0 | . | 4 | 5 | 9 | |
| - | 1 | 2 | 5 | 0 | 0 | 0 | . | 0 | 0 | 0 |
| . | 9 |
Subtract the numbers in the hundredths column from the top number:
5-0=5
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 9 | 5 | 9 | 2 | 0 | . | 4 | 5 | 9 | |
| - | 1 | 2 | 5 | 0 | 0 | 0 | . | 0 | 0 | 0 |
| . | 5 | 9 |
Subtract the numbers in the tenths column from the top number:
4-0=4
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 9 | 5 | 9 | 2 | 0 | . | 4 | 5 | 9 | |
| - | 1 | 2 | 5 | 0 | 0 | 0 | . | 0 | 0 | 0 |
| . | 4 | 5 | 9 |
Subtract the numbers in the ones column from the top number:
0-0=0
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 9 | 5 | 9 | 2 | 0 | . | 4 | 5 | 9 | |
| - | 1 | 2 | 5 | 0 | 0 | 0 | . | 0 | 0 | 0 |
| 0 | . | 4 | 5 | 9 |
Subtract the numbers in the tens column from the top number:
2-0=2
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 9 | 5 | 9 | 2 | 0 | . | 4 | 5 | 9 | |
| - | 1 | 2 | 5 | 0 | 0 | 0 | . | 0 | 0 | 0 |
| 2 | 0 | . | 4 | 5 | 9 |
Subtract the numbers in the hundreds column from the top number:
9-0=9
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 9 | 5 | 9 | 2 | 0 | . | 4 | 5 | 9 | |
| - | 1 | 2 | 5 | 0 | 0 | 0 | . | 0 | 0 | 0 |
| 9 | 2 | 0 | . | 4 | 5 | 9 |
Subtract the numbers in the thousands column from the top number:
5-5=0
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 9 | 5 | 9 | 2 | 0 | . | 4 | 5 | 9 | |
| - | 1 | 2 | 5 | 0 | 0 | 0 | . | 0 | 0 | 0 |
| 0 | 9 | 2 | 0 | . | 4 | 5 | 9 |
Subtract the numbers in the ten thousands column from the top number:
9-2=7
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 9 | 5 | 9 | 2 | 0 | . | 4 | 5 | 9 | |
| - | 1 | 2 | 5 | 0 | 0 | 0 | . | 0 | 0 | 0 |
| 7 | 0 | 9 | 2 | 0 | . | 4 | 5 | 9 |
Subtract the numbers in the hundred thousands column from the top number:
2-1=1
| Place value | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 9 | 5 | 9 | 2 | 0 | . | 4 | 5 | 9 | |
| - | 1 | 2 | 5 | 0 | 0 | 0 | . | 0 | 0 | 0 |
| 1 | 7 | 0 | 9 | 2 | 0 | . | 4 | 5 | 9 |
The solution is: 170920.459
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