คำตอบ - Long addition
คำอธิบายทีละขั้นตอน
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| TABLE_NAME_CARRY | |||||||
| 0 | . | 0 | 0 | 0 | 4 | 6 | |
| 0 | . | 0 | 0 | 0 | 9 | 4 | |
| + | 0 | . | 0 | 0 | 1 | 0 | 2 |
| . |
2. Add up the digits in each column, from right to left
Add the numbers in the hundred thousandths place value.
6+4+2=12
Write 2 in the hundred thousandths place.
Because the sum is greater than 9, carry the 1 to the ten thousandths place.
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| TABLE_NAME_CARRY | 1 | ||||||
| 0 | . | 0 | 0 | 0 | 4 | 6 | |
| 0 | . | 0 | 0 | 0 | 9 | 4 | |
| + | 0 | . | 0 | 0 | 1 | 0 | 2 |
| . | 2 |
Add the numbers in the ten thousandths place value.
1+4+9+0=14
Write 4 in the ten thousandths place.
Because the sum is greater than 9, carry the 1 to the thousandths place.
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| TABLE_NAME_CARRY | 1 | 1 | |||||
| 0 | . | 0 | 0 | 0 | 4 | 6 | |
| 0 | . | 0 | 0 | 0 | 9 | 4 | |
| + | 0 | . | 0 | 0 | 1 | 0 | 2 |
| . | 4 | 2 |
Add the numbers in the thousandths place value.
1+0+0+1=2
Write 2 in the thousandths place.
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| TABLE_NAME_CARRY | 1 | 1 | |||||
| 0 | . | 0 | 0 | 0 | 4 | 6 | |
| 0 | . | 0 | 0 | 0 | 9 | 4 | |
| + | 0 | . | 0 | 0 | 1 | 0 | 2 |
| . | 2 | 4 | 2 |
Add the numbers in the hundredths place value.
0+0+0=0
Write 0 in the hundredths place.
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| TABLE_NAME_CARRY | 1 | 1 | |||||
| 0 | . | 0 | 0 | 0 | 4 | 6 | |
| 0 | . | 0 | 0 | 0 | 9 | 4 | |
| + | 0 | . | 0 | 0 | 1 | 0 | 2 |
| . | 0 | 2 | 4 | 2 |
Add the numbers in the tenths place value.
0+0+0=0
Write 0 in the tenths place.
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| TABLE_NAME_CARRY | 1 | 1 | |||||
| 0 | . | 0 | 0 | 0 | 4 | 6 | |
| 0 | . | 0 | 0 | 0 | 9 | 4 | |
| + | 0 | . | 0 | 0 | 1 | 0 | 2 |
| . | 0 | 0 | 2 | 4 | 2 |
Add the numbers in the ones place value.
0+0+0=0
Write 0 in the ones place.
| Place value | ones | . | tenths | hundredths | thousandths | ten thousandths | hundred thousandths |
| TABLE_NAME_CARRY | 1 | 1 | |||||
| 0 | . | 0 | 0 | 0 | 4 | 6 | |
| 0 | . | 0 | 0 | 0 | 9 | 4 | |
| + | 0 | . | 0 | 0 | 1 | 0 | 2 |
| 0 | . | 0 | 0 | 2 | 4 | 2 |
The solution is: 0.00242
ทำไมต้องเรียนสิ่งนี้
Learn more with Tiger
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.