Soluzione - Long subtraction
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | |||||||
| , |
Put zeros in the blank number places:
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| , |
2. Subtract the numbers using long subtraction method
Subtract the numbers in the thousandths column from the top number:
5-0=5
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| , | 5 |
Subtract the numbers in the hundredths column from the top number:
7-0=7
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| , | 7 | 5 |
Subtract the numbers in the tenths column from the top number:
6-0=6
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| , | 6 | 7 | 5 |
Subtract the numbers in the ones column from the top number:
1-0=1
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| 1 | , | 6 | 7 | 5 |
Subtract the numbers in the tens column from the top number:
3-0=3
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| 3 | 1 | , | 6 | 7 | 5 |
Because the upper digit (1) in the hundreds column is too small to get a positive difference, borrow 1 from the digit (6) in the next number place which becomes (5) and get (11).
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 11 | ||||||||||
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| 3 | 1 | , | 6 | 7 | 5 |
Subtract the numbers in the hundreds column from the top number:
11-8=3
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 11 | ||||||||||
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| 3 | 3 | 1 | , | 6 | 7 | 5 |
Subtract the numbers in the thousands column from the top number:
5-4=1
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 11 | ||||||||||
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| 1 | 3 | 3 | 1 | , | 6 | 7 | 5 |
Write 9 in the ten thousands place.
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 11 | ||||||||||
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| 9 | 1 | 3 | 3 | 1 | , | 6 | 7 | 5 |
Write 7 in the hundred thousands place.
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 11 | ||||||||||
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| 7 | 9 | 1 | 3 | 3 | 1 | , | 6 | 7 | 5 |
Write 1 in the millions place.
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones | . | tenths | hundredths | thousandths |
| 5 | 11 | ||||||||||
| 1 | 7 | 9 | 6 | 1 | 3 | 1 | , | 6 | 7 | 5 | |
| - | 4 | 8 | 0 | 0 | , | 0 | 0 | 0 | |||
| 1 | 7 | 9 | 1 | 3 | 3 | 1 | , | 6 | 7 | 5 |
The solution is: 1791331,675
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