Teaching the Algorithm for Addition – Step by Step

Introducing the addition algorithm can feel like a big step for some students, especially after working with smaller numbers or using hands-on strategies. This PowerPoint presentation is designed to break down algorithm addition into clear, easy-to-follow steps using visual support and a conversational teaching style.

As the teacher, you can act as the narrator while presenting the slides to help guide your students through each step. The resource is carefully structured to chunk the algorithm for addition into manageable parts, making it easier for learners to stay focused and understand what’s happening in each column.

Encourage students to continue using their preferred mental strategies alongside the addition algorithm when appropriate. This helps build confidence, number sense, and flexibility as they move toward using more formal written methods.

Why Conceptual Understanding Must Come First

Before introducing the algorithm addition process, it’s essential that students understand what regrouping means and why it works. Begin with hands-on tools such as MAB blocks or place value mats. These resources help students see how ten ones can be exchanged for a ten, and how regrouping is based on our place value system.

Once students can confidently model and explain addition with regrouping using MAB materials, they’ll be better prepared to connect their understanding to the written algorithm for addition.

Starting with a strong conceptual base ensures that students don’t just memorise the steps—they understand why they work.

See Regrouping Come to Life with Animation

When viewed in ‘Slide Show’ mode, the presentation includes animations that bring the addition algorithm to life. Students will actually see digits move and regroup across place value columns, helping them visualise the process of carrying numbers to the correct place.

These animations reinforce the logic of algorithm addition and help students connect the concrete steps they’ve learned with the more abstract written method.

Other Addition Strategies

Take a look at some of our other addition strategy teaching presentations below:

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