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 |
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | ||
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , |
Put zeros in the blank number places:
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the hundred thousandths column is too small to get a positive difference, borrow 1 from the digit (2) in the next number place which becomes (1) and get (10).
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , |
Subtract the numbers in the hundred thousandths column from the top number:
10-0-4=6
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , | 6 |
Because the upper digit (1) in the ten thousandths column is too small to get a positive difference, borrow 1 from the digit (1) in the next number place which becomes (0) and get (11).
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 0 | 11 | ||||||||
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , | 6 |
Subtract the numbers in the ten thousandths column from the top number:
11-6=5
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 0 | 11 | ||||||||
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , | 5 | 6 |
Because the upper digit (0) in the thousandths column is too small to get a positive difference, borrow 1 from the digit (9) in the next number place which becomes (8) and get (10).
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 8 | 10 | ||||||||
| 0 | 11 | ||||||||
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , | 5 | 6 |
Subtract the numbers in the thousandths column from the top number:
10-7=3
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 8 | 10 | ||||||||
| 0 | 11 | ||||||||
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , | 3 | 5 | 6 |
Subtract the numbers in the hundredths column from the top number:
8-8=0
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 8 | 10 | ||||||||
| 0 | 11 | ||||||||
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , | 0 | 3 | 5 | 6 |
Because the upper digit (8) in the tenths 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 (18).
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 5 | 18 | ||||||||
| 8 | 10 | ||||||||
| 0 | 11 | ||||||||
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , | 0 | 3 | 5 | 6 |
Subtract the numbers in the tenths column from the top number:
18-9=9
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 5 | 18 | ||||||||
| 8 | 10 | ||||||||
| 0 | 11 | ||||||||
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , | 9 | 0 | 3 | 5 | 6 |
Because the upper digit (5) in the ones column is too small to get a positive difference, borrow 1 from the digit (4) in the next number place which becomes (3) and get (15).
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 3 | 15 | ||||||||
| 5 | 18 | ||||||||
| 8 | 10 | ||||||||
| 0 | 11 | ||||||||
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| , | 9 | 0 | 3 | 5 | 6 |
Subtract the numbers in the ones column from the top number:
15-9=6
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 3 | 15 | ||||||||
| 5 | 18 | ||||||||
| 8 | 10 | ||||||||
| 0 | 11 | ||||||||
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| 6 | , | 9 | 0 | 3 | 5 | 6 |
Subtract the numbers in the tens column from the top number:
3-2=1
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 3 | 15 | ||||||||
| 5 | 18 | ||||||||
| 8 | 10 | ||||||||
| 0 | 11 | ||||||||
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| 1 | 6 | , | 9 | 0 | 3 | 5 | 6 |
Write 3 in the hundreds place.
| Place value | hundreds | tens | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| 3 | 15 | ||||||||
| 5 | 18 | ||||||||
| 8 | 10 | ||||||||
| 0 | 11 | ||||||||
| 1 | 10 | ||||||||
| 3 | 4 | 6 | , | 8 | 9 | 1 | 2 | 0 | |
| - | 2 | 9 | , | 9 | 8 | 7 | 6 | 4 | |
| 3 | 1 | 6 | , | 9 | 0 | 3 | 5 | 6 |
The solution is: 316,90356
Come ci siamo comportati?
Lasciaci un feedbackPerché imparare questo
Why learn this