Soluzione - Aggiunta lunga
59,7
Spiegazione passo passo
1. Rewrite the numbers from top to bottom, aligned by their place values
| Place value | tens | ones | . | tenths |
| TABLE_NAME_CARRY | ||||
| 1 | 0 | , | 1 | |
| 2 | 1 | , | 5 | |
| + | 2 | 8 | , | 1 |
| , |
2. Add up the digits in each column, from right to left
Add the numbers in the tenths place value.
1+5+1=7
Write 7 in the tenths place.
| Place value | tens | ones | . | tenths |
| TABLE_NAME_CARRY | ||||
| 1 | 0 | , | 1 | |
| 2 | 1 | , | 5 | |
| + | 2 | 8 | , | 1 |
| , | 7 |
Add the numbers in the ones place value.
0+1+8=9
Write 9 in the ones place.
| Place value | tens | ones | . | tenths |
| TABLE_NAME_CARRY | ||||
| 1 | 0 | , | 1 | |
| 2 | 1 | , | 5 | |
| + | 2 | 8 | , | 1 |
| 9 | , | 7 |
Add the numbers in the tens place value.
1+2+2=5
Write 5 in the tens place.
| Place value | tens | ones | . | tenths |
| TABLE_NAME_CARRY | ||||
| 1 | 0 | , | 1 | |
| 2 | 1 | , | 5 | |
| + | 2 | 8 | , | 1 |
| 5 | 9 | , | 7 |
The solution is: 59,7
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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.