Doubles Plus 1 Addition Activity | Montessori-Inspired Mental Maths Cards

Your child knows some doubles facts—but do they recognise that 6 + 7 can be solved by using 6 + 6 and adding one more?

Near doubles are one of the most useful bridges between counting every object and recalling addition facts efficiently. However, children may not discover this relationship independently—especially when the fact is presented without concrete or visual support.

This Montessori Near Doubles Addition Pack uses coloured bead-bar representations, visual charts, self-correcting clip cards, progressive task cards and word problems to help children understand and apply the doubles plus one strategy.

Instead of memorising another disconnected set of equations, learners build on facts they already know.

Turn Known Doubles Into New Addition Facts

If a child already knows that:

5 + 5 = 10

they can use that knowledge to solve:

5 + 6 = 11

The second addend is only one greater, so the total is one greater too.

This pack helps children see that relationship through familiar Montessori colours and quantities. Learners compare an equal pair with a near-double pair, notice the extra unit and connect the visual change with the new total.

What Is Included?

Near-Doubles Control Chart

A two-page completed reference chart shows the doubles and corresponding doubles-plus-one facts using Montessori coloured bead-bar imagery.

Children can use the chart to:

• compare the known double with the near double;
• notice the additional unit;
• identify the new total; and
• check their independent work.

Two Reusable Blank Charts

The blank versions retain the bead-bar visuals but remove the numerals and totals. Children can add the missing information with a dry-erase marker after laminating.

The charts may be left whole or cut into individual strips for matching, sequencing or focused work with one fact at a time.

Self-Correcting Clip Cards

Multiple-choice clip cards show near-double quantities using coloured bead representations. Children choose the correct total with a peg or counter, then turn the card over to check their answer.

Prepared answer backs are included, although you can also add a simple control dot manually to reduce printing.

Three Progressive Task-Card Sets

Set A: Bead Bar and Numeral
One addend is represented by a Montessori coloured bead bar and the other is shown as a numeral. Children combine the visual quantity with the written number.

Set B: Numeral Equations
Both addends are written as numerals. This removes the bead image and encourages children to apply the near-doubles strategy more abstractly.

Set C: Word Problems
Short contextual problems ask children to interpret, calculate and apply addition relationships within simple everyday situations.

Recording and Missing-Addend Sheets

The pack finishes with two reusable recording activities:

• one asks children to complete the missing consecutive addend; and
• one asks them to calculate the complete near-double equation.

Answer versions are included for checking.

A Concrete-to-Fluent Learning Sequence

1. Review doubles. Build familiar doubles with physical coloured bead bars.
2. Add one more. Replace one bead bar with the next quantity and discuss what changed.
3. Use the control chart. Compare the double and near double visually.
4. Complete the blank charts. Add the missing numerals and totals.
5. Use the clip cards. Practise recognising the total independently.
6. Move into written equations. Introduce Task Card Sets A and B.
7. Apply the strategy. Complete the contextual problems and recording sheets.

Particularly Helpful for Neurodivergent Learners

The stable Montessori bead colours provide visual memory cues, while each task card presents one manageable problem at a time. Learners can move gradually from visual quantities to abstract equations rather than being expected to hold every step in working memory.

The resource may be especially helpful for children who:

• continue counting every object or finger;
• know doubles but do not transfer that knowledge;
• benefit from predictable visual patterns;
• need repeated practice in varied formats;
• find crowded worksheets overwhelming; or
• become anxious during timed fact-fluency work.

Ways to Use This Resource

• Follow-up after Montessori coloured bead work
• Montessori maths shelves
• Addition strategy lessons
• Basic-fact intervention
• Independent work cycles
• Maths centres and rotations
• Partner work
• Homeschool maths
• Early-finisher activities
• Formative assessment

Created by an Experienced Montessori Educator

I’m Lisa—an NZ registered teacher, Montessori-trained educator, school principal and former homeschooler. I create practical resources for mixed-age classrooms and diverse learners, including children who understand quantities but need a clearer pathway towards efficient mental calculation.