Soluzione - Long subtraction
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 1 | 8 | 0 | ||||||||||
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| , |
Put zeros in the blank number places:
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the hundred millionths column is too small to get a positive difference, borrow 1 from the number to the left (80.0000000) which becomes (79.9999999) and get (10).
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| , |
Subtract the numbers in the hundred millionths column from the top number:
10-0-3=7
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| , | 7 |
Subtract the numbers in the ten millionths column from the top number:
9-3=6
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| , | 6 | 7 |
Subtract the numbers in the millionths column from the top number:
9-3=6
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| , | 6 | 6 | 7 |
Subtract the numbers in the hundred thousandths column from the top number:
9-3=6
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| , | 6 | 6 | 6 | 7 |
Subtract the numbers in the ten thousandths column from the top number:
9-3=6
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| , | 6 | 6 | 6 | 6 | 7 |
Subtract the numbers in the thousandths column from the top number:
9-3=6
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| , | 6 | 6 | 6 | 6 | 6 | 7 |
Subtract the numbers in the hundredths column from the top number:
9-3=6
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| , | 6 | 6 | 6 | 6 | 6 | 6 | 7 |
Subtract the numbers in the tenths column from the top number:
9-3=6
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| , | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 |
Subtract the numbers in the ones column from the top number:
9-5=4
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| 4 | , | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 |
Subtract the numbers in the tens column from the top number:
7-2=5
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| 5 | 4 | , | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 |
Write 1 in the hundreds place.
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths | millionths | ten millionths | hundred millionths |
| 7 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | |||
| 1 | 8 | 0 | , | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| - | 2 | 5 | , | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| 1 | 5 | 4 | , | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 |
The solution is: 154,66666667
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