Add 3 numbers (missing addend)

Find the missing number in three-addend sums (builds inverse reasoning).

Coming Soon

Visual Guide: Add 3 numbers (missing addend)

Find the missing number to complete the addition equation.

Open Printable Worksheet

Select a grade to browse printable worksheets on this topic.

Take a photo of your completed worksheet and we'll check your answers instantly.

Coming Soon

Hi! I'm here to help.
Are you stuck on a specific question?

How do I start this?