คำตอบ - Long addition
คำอธิบายทีละขั้นตอน
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | |||||||
| 2 | 4 | 0 | 3 | 8 | |||
| + | 2 | 0 | 6 | 0 | 4 | 0 | 0 |
2. Add up the digits in each column, from right to left
Add the numbers in the ones place value.
8+0=8
Write 8 in the ones place.
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | |||||||
| 2 | 4 | 0 | 3 | 8 | |||
| + | 2 | 0 | 6 | 0 | 4 | 0 | 0 |
| 8 |
Add the numbers in the tens place value.
3+0=3
Write 3 in the tens place.
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | |||||||
| 2 | 4 | 0 | 3 | 8 | |||
| + | 2 | 0 | 6 | 0 | 4 | 0 | 0 |
| 3 | 8 |
Add the numbers in the hundreds place value.
0+4=4
Write 4 in the hundreds place.
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | |||||||
| 2 | 4 | 0 | 3 | 8 | |||
| + | 2 | 0 | 6 | 0 | 4 | 0 | 0 |
| 4 | 3 | 8 |
Add the numbers in the thousands place value.
4+0=4
Write 4 in the thousands place.
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | |||||||
| 2 | 4 | 0 | 3 | 8 | |||
| + | 2 | 0 | 6 | 0 | 4 | 0 | 0 |
| 4 | 4 | 3 | 8 |
Add the numbers in the ten thousands place value.
2+6=8
Write 8 in the ten thousands place.
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | |||||||
| 2 | 4 | 0 | 3 | 8 | |||
| + | 2 | 0 | 6 | 0 | 4 | 0 | 0 |
| 8 | 4 | 4 | 3 | 8 |
Add the numbers in the hundred thousands place value.
Write 0 in the hundred thousands place.
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | |||||||
| 2 | 4 | 0 | 3 | 8 | |||
| + | 2 | 0 | 6 | 0 | 4 | 0 | 0 |
| 0 | 8 | 4 | 4 | 3 | 8 |
Add the numbers in the millions place value.
Write 2 in the millions place.
| Place value | millions | hundred thousands | ten thousands | thousands | hundreds | tens | ones |
| TABLE_NAME_CARRY | |||||||
| 2 | 4 | 0 | 3 | 8 | |||
| + | 2 | 0 | 6 | 0 | 4 | 0 | 0 |
| 2 | 0 | 8 | 4 | 4 | 3 | 8 |
The solution is: 2,084,438
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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.