# Double of numbers addition strategy

When it comes to solving mathematical problems, especially addition, there are various strategies that can be employed to simplify the process and arrive at the correct answer quickly. One such strategy is the “Double of Numbers Addition Strategy.” This approach involves doubling numbers to make calculations more manageable and efficient. In this comprehensive guide, we will explore the concept of doubling numbers for addition and provide examples to illustrate its application.

## Understanding the Double of Numbers Addition Strategy

The Double of Numbers Addition Strategy is based on the principle of using properties of numbers to simplify addition. It involves doubling one or more numbers in an addition problem to create an easier calculation. This strategy is particularly useful when dealing with larger numbers, as it reduces the complexity of mental or written calculations.

## How to Apply the Double of Numbers Addition Strategy

To use the Double of Numbers Addition Strategy effectively, follow these steps:

1. Identify the Numbers to Be Doubled:  In the addition problem you are solving, identify one or more numbers that can be doubled to simplify the calculation. Typically, you would choose the number(s) that make the addition more straightforward.
2. Double the Identified Number(s): Multiply the identified number(s) by 2 to obtain their doubles. This effectively transforms the problem into a simpler one.
3. Perform the Addition: Add the doubled number(s) along with the other numbers in the problem. This step should be significantly easier compared to the original problem.
4. Adjust for the Doubled Numbers: Since you doubled one or more numbers, you will need to adjust the final answer to account for this. This usually involves subtracting the amount by which the numbers were doubled from the total sum.

## Examples of the Double of Numbers Addition Strategy

Let’s explore several examples to illustrate how the Double of Numbers Addition Strategy works:

### Example 1: Adding Two Large Numbers

Original Problem: 647 + 528

Application of the Strategy:

• Double the second number (528): 528 x 2 = 1056
• Add the doubled number to the first number (647 + 1056).
• The result is 1703.

In this example, we doubled the second number to make the addition more manageable, and then adjusted the answer by subtracting the amount by which we doubled the number (528) to arrive at the correct result (1703).

### Example 2: Adding Multiple Numbers

Original Problem: 385 + 247 + 136 + 198

Application of the Strategy:

• Double the first number (385): 385 x 2 = 770
• Keep the second number as is (247).
• Double the third number (136): 136 x 2 = 272
• Keep the fourth number as is (198).
• Add all the numbers together: 770 + 247 + 272 + 198.
• The result is 1487.

In this more complex example, we applied the strategy to double the first and third numbers, simplifying the addition process. After adding all the numbers, we adjusted the answer by subtracting the sum of the doubled numbers (385 + 136) to obtain the final result (1487).

### Example 3: Adding Numbers with Regrouping

Original Problem: 498 + 237

Application of the Strategy:

• Double the second number (237): 237 x 2 = 474
• Add the doubled number to the first number (498 + 474).
• The result is 972.

In this example, we used the strategy to double the second number and added it to the first number. There was no need for adjustment in this case because regrouping was not required. 