Horizontal Addition of Two Numbers

1. Addition

This engaging worksheet invites you to utilize the powerful Split & Add technique, enabling you to effortlessly arrive at the final result using a left-to-right approach.

In each problem, you'll encounter two numbers as addends, positioned horizontally with a plus sign in between. Your objective is to swiftly calculate the sum of these two numbers in the left-to-right direction, exercising mental agility and quick computation.

The power is in your hands as you explore a range of options to personalize your learning experience. Choose the number of digits for both the 1st and 2nd addends, selecting from 1 to 3 digits. To heighten the challenge and reinforce your skills, you can opt to exclude 0s and/or 1s from the addends, creating a dynamic practice environment.

The Split & Add technique is a powerful mental maths method that allows you to perform addition swiftly and accurately without the need for writing anything down. This versatile approach involves breaking one of the numbers being added into manageable parts and adding them separately to the other number. The method works seamlessly with two-digit, three-digit, and even larger numbers, making it an essential tool for mastering mental maths.

To employ the Split & Add method, start by splitting one of the numbers into components that are easy to work with mentally. For instance, if adding 245 and 378, you can break 378 into 300 and 78. Next, add the larger part, 300, to the other number, 245, to get 545. Then, add the remaining part, 78, to the result from the previous step, 545, to obtain the final answer of 623. The beauty of this technique lies in its simplicity and the ability to mentally combine the numbers with ease.

Through consistent practice, the Split & Add method becomes a valuable mental maths tool that enhances calculation speed and boosts overall arithmetic skills. By eliminating the need for writing down intermediate steps, this technique enables rapid problem-solving in various real-life scenarios, from grocery shopping to budgeting. Embracing the Split & Add technique empowers learners of all ages to tackle addition challenges confidently, making mental maths an enjoyable and efficient endeavor.

Prepare to witness your skills flourish and your mathematical horizons expand with each and every horizontal sum.

The Worksheet


This configurable worksheet presents 18 variants. Including the number of problems option, the total number of variants comes to 90.

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