คำตอบ - Long addition
คำอธิบายทีละขั้นตอน
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | |||||
| 2 | 9 | 8 | 4 | ||
| 1 | 4 | 9 | 2 | 0 | |
| + | 3 | 7 | 3 | 0 | 0 |
2. Add up the digits in each column, from right to left
Add the numbers in the ones place value.
4+0+0=4
Write 4 in the ones place.
| Place value | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | |||||
| 2 | 9 | 8 | 4 | ||
| 1 | 4 | 9 | 2 | 0 | |
| + | 3 | 7 | 3 | 0 | 0 |
| 4 |
Add the numbers in the tens place value.
8+2+0=10
Write 0 in the tens place.
Because the sum is greater than 9, carry the 1 to the hundreds place.
| Place value | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | 1 | ||||
| 2 | 9 | 8 | 4 | ||
| 1 | 4 | 9 | 2 | 0 | |
| + | 3 | 7 | 3 | 0 | 0 |
| 0 | 4 |
Add the numbers in the hundreds place value.
1+9+9+3=22
Write 2 in the hundreds place.
Because the sum is greater than 9, carry the 2 to the thousands place.
| Place value | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | 2 | 1 | |||
| 2 | 9 | 8 | 4 | ||
| 1 | 4 | 9 | 2 | 0 | |
| + | 3 | 7 | 3 | 0 | 0 |
| 2 | 0 | 4 |
Add the numbers in the thousands place value.
2+2+4+7=15
Write 5 in the thousands place.
Because the sum is greater than 9, carry the 1 to the ten thousands place.
| Place value | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | 1 | 2 | 1 | ||
| 2 | 9 | 8 | 4 | ||
| 1 | 4 | 9 | 2 | 0 | |
| + | 3 | 7 | 3 | 0 | 0 |
| 5 | 2 | 0 | 4 |
Add the numbers in the ten thousands place value.
1+1+3=5
Write 5 in the ten thousands place.
| Place value | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | 1 | 2 | 1 | ||
| 2 | 9 | 8 | 4 | ||
| 1 | 4 | 9 | 2 | 0 | |
| + | 3 | 7 | 3 | 0 | 0 |
| 5 | 5 | 2 | 0 | 4 |
The solution is: 55,204
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Addition is the most basic math action and is used daily by almost everybody. Playing games, paying at the supermarket, and cooking are just a few examples of when we add.
Long addition is a clear and simple method to add numbers. Especially big numbers.
Although today calculators do this job for us, understanding the concept of addition is a key ability for understanding math.