Horizontal Addition with the Chosen Addend

Introduction

Welcome to the Horizontal Addition with the Chosen Addend worksheet. This interactive practice is designed to strengthen mental math skills by combining a fixed (chosen) addend with randomly generated one- or two-digit augends.

Each problem invites you to repeatedly add the same chosen number to different values, helping you build strong familiarity with number relationships and addition patterns.

Understanding the Chosen Addend Structure

In every problem:

• One number remains fixed — the chosen addend
• The other number — the augend — changes each time
• You calculate the sum for each pair

The chosen addend can be selected from 2 to 35, making it possible to focus deeply on one number and explore how it interacts with both near and far augends.

This repeated-addition structure is especially effective for:

• Strengthening number bonds
• Improving recall speed
• Developing confidence through pattern recognition

Configurable Augend Difficulty Levels

This worksheet is fully configurable, allowing you to control the difficulty with precision.

You can choose from the following augend ranges:

• Level 1: 2 to 19
• Level 2: 22 to 49
• Level 3: 52 to 99
• All Levels: A mixed range covering all values above

These options allow learners to:

• Start with comfortable ranges
• Progress gradually to larger numbers
• Practice across mixed difficulty levels

Each configuration generates a fresh set of problems, enabling repeated practice without memorization.

Mathematical Terms Used

In an addition expression such as a + b = c:

• Augend (a): The number being increased
• Addend (b): The number added to the augend
• Sum (c): The result of the addition

Skills Developed Through This Worksheet

This worksheet helps learners:

• Improve mental addition speed
• Strengthen place-value awareness
• Build fluency with repeated addition

You may also explore the corresponding subtraction worksheet, which follows the same structure and difficulty progression, offering a consistent learning experience across operations.

Online, Interactive, and Self-Correcting

This is an online, interactive addition worksheet.

• Type answers directly into the input boxes
• Receive instant feedback
• Correct mistakes immediately

No printing or downloading is required.