Penyelesaian - Long subtraction
19.974
Penjelasan langkah demi langkah
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 1 | |||||
| - | 1 | . | 0 | 2 | 6 | |
| . |
Put zeros in the blank number places:
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 2 | 1 | . | 0 | 0 | 0 | |
| - | 1 | . | 0 | 2 | 6 | |
| . |
2. Subtract the numbers using long subtraction method
Because the upper digit (0) in the thousandths column is too small to get a positive difference, borrow 1 from the number to the left (1.00) which becomes (0.99) and get (10).
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 0 | 9 | 9 | 10 | |||
| 2 | 1 | . | 0 | 0 | 0 | |
| - | 1 | . | 0 | 2 | 6 | |
| . |
Subtract the numbers in the thousandths column from the top number:
10-0-6=4
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 0 | 9 | 9 | 10 | |||
| 2 | 1 | . | 0 | 0 | 0 | |
| - | 1 | . | 0 | 2 | 6 | |
| . | 4 |
Subtract the numbers in the hundredths column from the top number:
9-2=7
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 0 | 9 | 9 | 10 | |||
| 2 | 1 | . | 0 | 0 | 0 | |
| - | 1 | . | 0 | 2 | 6 | |
| . | 7 | 4 |
Subtract the numbers in the tenths column from the top number:
9-0=9
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 0 | 9 | 9 | 10 | |||
| 2 | 1 | . | 0 | 0 | 0 | |
| - | 1 | . | 0 | 2 | 6 | |
| . | 9 | 7 | 4 |
Because the upper digit (0) in the ones 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 | tens | ones | . | tenths | hundredths | thousandths |
| 1 | 10 | |||||
| 0 | 9 | 9 | 10 | |||
| 2 | 1 | . | 0 | 0 | 0 | |
| - | 1 | . | 0 | 2 | 6 | |
| . | 9 | 7 | 4 |
Subtract the numbers in the ones column from the top number:
10-1=9
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 1 | 10 | |||||
| 0 | 9 | 9 | 10 | |||
| 2 | 1 | . | 0 | 0 | 0 | |
| - | 1 | . | 0 | 2 | 6 | |
| 9 | . | 9 | 7 | 4 |
Write 1 in the tens place.
| Place value | tens | ones | . | tenths | hundredths | thousandths |
| 1 | 10 | |||||
| 0 | 9 | 9 | 10 | |||
| 2 | 1 | . | 0 | 0 | 0 | |
| - | 1 | . | 0 | 2 | 6 | |
| 1 | 9 | . | 9 | 7 | 4 |
The solution is: 19.974
Mengapa belajar ini
Learn more with Tiger
Why learn this