คำตอบ - Long addition
คำอธิบายทีละขั้นตอน
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | ones | . | tenths | hundredths |
| Carry | ||||
| 2 | . | 6 | 7 | |
| 5 | . | 1 | ||
| 1 | . | 3 | ||
| + | 0 | . | 9 | |
| . |
Put zeros in the blank number places:
| Place value | ones | . | tenths | hundredths |
| Carry | ||||
| 2 | . | 6 | 7 | |
| 5 | . | 1 | 0 | |
| 1 | . | 3 | 0 | |
| + | 0 | . | 9 | 0 |
| . |
2. Add up the digits in each column, from right to left
Add the numbers in the hundredths place value.
7+0+0+0=7
Write 7 in the hundredths place.
| Place value | ones | . | tenths | hundredths |
| Carry | ||||
| 2 | . | 6 | 7 | |
| 5 | . | 1 | 0 | |
| 1 | . | 3 | 0 | |
| + | 0 | . | 9 | 0 |
| . | 7 |
Add the numbers in the tenths place value.
6+1+3+9=19
Write 9 in the tenths place.
Because the sum is greater than 9, carry the 1 to the ones place.
| Place value | ones | . | tenths | hundredths |
| Carry | 1 | |||
| 2 | . | 6 | 7 | |
| 5 | . | 1 | 0 | |
| 1 | . | 3 | 0 | |
| + | 0 | . | 9 | 0 |
| . | 9 | 7 |
Add the numbers in the ones place value.
1+2+5+1+0=9
Write 9 in the ones place.
| Place value | ones | . | tenths | hundredths |
| Carry | 1 | |||
| 2 | . | 6 | 7 | |
| 5 | . | 1 | 0 | |
| 1 | . | 3 | 0 | |
| + | 0 | . | 9 | 0 |
| 9 | . | 9 | 7 |
The solution is: 9.97
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.