Question

Adding and Subtracting Signed Numbers Combine as indicated. $$926+863$$

Short answer

The sum of 926 and 863 is 1789.

Step-by-step solution

Identify the Operation

Recognize that the problem is asking to perform an addition operation on two positive numbers.

Align the Numbers

Write the numbers one on top of the other, aligning the digits according to their place values (ones under ones, tens under tens, etc.).

Add the Numbers

Begin adding from the rightmost column (ones place) and move to the left, carrying over to the next column if necessary.

Write the Result

After adding each column, write down the sum below the line to obtain the final result of the addition.

Key concepts

Addition Operation

When we talk about the addition operation, we refer to the process of combining two or more numbers to get a new total called the sum. In our daily lives, we use addition to count money, tally scores, or calculate distances. In the exercise given, you are asked to add two positive numbers, 926 and 863. It's important to recognize that the sign of these numbers (+) is crucial as it indicates that we are combining amounts. For positive numbers, the addition operation simply increases the total value. When dealing with signed numbers, if both numbers have the same sign, as in this case, you can proceed just like with plain positive numbers. However, if the numbers had opposite signs, you'd need to be aware of the rules for adding positive and negative numbers to find the correct sum.

In the provided step-by-step solution, the focus is on adding numbers with the same sign. The rules are straightforward: Add their absolute values and give the sum the common sign.

Place Value Alignment

Properly aligning numbers by place value is vital in ensuring accurate calculation in addition. Each digit in a number has a place value based on its position, such as ones, tens, hundreds, and so on. Here's why place value alignment is essential:

• Prevents miscalculation: Ensuring that each digit is in the correct column prevents mistakes in the addition process.
• Maintains the correct value of digits: A digit's value multiplies by 10 for each place it moves to the left. Without proper alignment, this value hierarchy is lost.

In the exercise (926 + 863), this means that the 6 in the rightmost position of each number is in the 'ones' place, the 2 and the 6 are in the 'tens' place, and the 9 and the 8 are in the 'hundreds' place. When the numbers are stacked one on top of the other with these places aligned, we ensure that we're correctly combining digits of the same place value, preventing errors and confusion.

Column Addition Method

The column addition method is an effective way to add numbers, especially when they're large. Here’s a simple breakdown of how to use this method:

• Step 1: Write the numbers in a vertical column, aligning the digits by their place values.
• Step 2: Start with the rightmost column (the 'ones' place) and add the digits as you would for a basic addition problem.
• Step 3: If the sum of a column is 10 or more, carry over the extra value to the next column to the left.
• Step 4: Repeat the addition process for each column, incorporating any carried value, until all columns are added.
• Step 5: Write the combined total of each column underneath to find the final result.

For example, after placing 926 and 863 in a column aligned by place value and starting from the 'ones' place, we add 6+3 = 9, and write that below the line in the 'ones' place. We then move to the 'tens' place where we add 2+6 = 8, and proceed in the same fashion across all columns. This ensures a clear and organized addition process that helps prevent errors, making it easier for learners to grasp and execute the addition operation correctly.

The key to mastering this method is practice, which allows students to become quicker and more accurate with their calculations.