Part-Part-Whole Dot Flash Cards | Sums 11–20 Number Sense Practice

Help students strengthen number sense, subitizing, and addition fluency with these Part-Part-Whole Dot Flash Cards. These cards show visual dot arrangements for sums 11–20, giving students repeated practice composing and decomposing numbers using part-part-whole relationships.

Each card includes dot images that represent addends and sums. Students can use the cards to identify parts, find the whole, determine missing addends, and build flexible thinking about numbers. The dot arrangements also support subitizing and dot talks, making this resource useful for whole group lessons, small groups, intervention, and take-home practice.

What’s Included

This resource includes 126 Part-Part-Whole Dot Flash Cards for sums 11–20.

The cards include:

• Visual dot arrangements for sums 11–20
• Multiple arrangements for the same set of addends
• Ten-frame style dot arrangements
• Subitizing-focused dot arrangements
• Part-part-whole representations
• Foldable card format for hiding an addend or the sum

Dot Arrangement Options

There are several dot arrangements for the same set of addends.

One set mirrors a ten frame arrangement, helping students connect the visuals to familiar math tools.

Other sets are designed to support subitizing, encouraging students to recognize quantities quickly without counting each dot one by one.

The dot images can also be used individually without the part-part-whole format for dot talks, number talks, and subitizing practice.

How to Use the Cards

Students can use these cards in several ways:

• Look at the parts and determine the whole
• Look at the whole and one part to find the missing addend
• Cover one addend and solve for the unknown
• Cover the sum and combine the parts
• Use dot arrangements for quick subitizing practice
• Discuss different ways to see and group the dots
• Compare multiple arrangements for the same number combination

Cut on the dotted line to fold back either addend or fold back the sum. You can also simply cover the number or dot image with your hand instead of folding.

Printing Tips

These cards were created as full-page cards, but they can be printed in multiple sizes.

Printing options include:

• Full-page cards
• Half-page cards
• Four cards per page for individual or take-home practice

Please note: Not all dotted lines are in the same place. Do not print back-to-back, and do not cut multiple sheets at the same time.

Skills Covered

Students will practice important early math skills, including:

• Part-part-whole relationships
• Addition sums 11–20
• Composing numbers
• Decomposing numbers
• Finding missing addends
• Building number sense
• Subitizing
• Dot talks
• Making ten
• Connecting visual models to equations
• Flexible thinking with numbers
• Addition fact fluency

Ways to Use This Resource

These Part-Part-Whole Dot Flash Cards are flexible and easy to use in many math routines.

Use them for:

• Small group instruction
• Whole group number talks
• Dot talks
• Math centers
• Intervention
• Fact fluency practice
• Morning tubs
• Partner practice
• Take-home practice
• Early finisher activities
• Addition strategy review
• Missing addend practice
• Number sense warm-ups

Why Teachers Love It

Teachers love these cards because they help students see addition as more than memorized facts. Students use visual models to understand how numbers are composed and decomposed, which supports stronger fact fluency and number sense.

The multiple dot arrangements help students recognize quantities in different ways, while the foldable format makes it easy to hide a part or whole for missing addend practice. The cards are also useful for dot talks and subitizing practice when used without the full part-part-whole layout.

Strengthen Addition Fluency and Number Sense

These Part-Part-Whole Dot Flash Cards for sums 11–20 give students meaningful visual practice with addition, missing addends, composing numbers, decomposing numbers, and subitizing. With 126 cards and multiple dot arrangements included, this resource is a practical tool for building flexible math thinking and fact fluency.