คำตอบ - Long addition
คำอธิบายทีละขั้นตอน
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| Carry | ||||||
| 5 | 2 | 7 | . | 6 | 9 | |
| + | 8 | 9 | . | 4 | 1 | |
| . |
2. Add up the digits in each column, from right to left
Add the numbers in the hundredths place value.
9+1=10
Write 0 in the hundredths place.
Because the sum is greater than 9, carry the 1 to the tenths place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| Carry | 1 | |||||
| 5 | 2 | 7 | . | 6 | 9 | |
| + | 8 | 9 | . | 4 | 1 | |
| . | 0 |
Add the numbers in the tenths place value.
1+6+4=11
Write 1 in the tenths place.
Because the sum is greater than 9, carry the 1 to the ones place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| Carry | 1 | 1 | ||||
| 5 | 2 | 7 | . | 6 | 9 | |
| + | 8 | 9 | . | 4 | 1 | |
| . | 1 | 0 |
Add the numbers in the ones place value.
1+7+9=17
Write 7 in the ones place.
Because the sum is greater than 9, carry the 1 to the tens place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| Carry | 1 | 1 | 1 | |||
| 5 | 2 | 7 | . | 6 | 9 | |
| + | 8 | 9 | . | 4 | 1 | |
| 7 | . | 1 | 0 |
Add the numbers in the tens place value.
1+2+8=11
Write 1 in the tens place.
Because the sum is greater than 9, carry the 1 to the hundreds place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| Carry | 1 | 1 | 1 | 1 | ||
| 5 | 2 | 7 | . | 6 | 9 | |
| + | 8 | 9 | . | 4 | 1 | |
| 1 | 7 | . | 1 | 0 |
Add the numbers in the hundreds place value.
1+5=6
Write 6 in the hundreds place.
| Place value | hundreds | tens | ones | . | tenths | hundredths |
| Carry | 1 | 1 | 1 | 1 | ||
| 5 | 2 | 7 | . | 6 | 9 | |
| + | 8 | 9 | . | 4 | 1 | |
| 6 | 1 | 7 | . | 1 | 0 |
The solution is: 617.1
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.