Problem Slips: Subtraction Working Charts

Name: Problem Slips: Subtraction Working Charts
Brand: Nienhuis Montessori
SKU: NIE-559534
Price: 62.86 EUR
Availability: InStock

Price

€62.86

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Shipping & Delivery

In Stock · 2-3 days

Quantity

Age Range3-6 Years

MaterialClear acrylic with lids

DimensionsApprox. 15 × 12 × 8 cm

CertificationAMI Approved

About

Hands-on to minds-on — these Problem Slips for Subtraction Working Charts provide systematic practice for young mathematicians mastering subtraction facts. Housed in two clear acrylic storage boxes, the cards feature green line indicators that guide children through progressive subtraction exercises, supporting the transition from concrete manipulatives to abstract mathematical thinking.

“The greatest sign of success for a teacher is to be able to say, 'The children are now working as if I did not exist.'”

— Maria MontessoriThe Absorbent Mind

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Everything You Need

Acrylic Storage Boxes2 clear boxes with lids

Subtraction Problem CardsComplete set with green indicators

The Montessori Method

The Problem Slips for Subtraction Working Charts serve as a bridge between concrete mathematical manipulation and abstract numerical thinking in the Montessori mathematics curriculum. These cards, stored in clear acrylic boxes for easy visibility and access, present subtraction problems in a systematic sequence that respects the child's mathematical development. The green line indicators on each slip provide visual guidance without overwhelming the learner, allowing children to work through subtraction facts at their own pace. Unlike traditional worksheets, these problem slips isolate individual equations, enabling focused concentration on one mathematical relationship at a time. The cards complement the Subtraction Working Charts by providing structured practice opportunities that reinforce pattern recognition in subtraction facts. Through repeated work with these problem slips, children internalize the relationships between numbers, building the foundation for mental calculation. The clear acrylic storage boxes ensure the materials remain organized and accessible, inviting independent mathematical exploration.

✹Masters subtraction facts from 18-1 through systematic practice✹Develops pattern recognition in subtraction relationships✹Builds speed and accuracy in mental calculation✹Strengthens abstract mathematical thinking through repeated exposure✹Gains confidence in independent problem-solving

Problem Slips: Subtraction Working Charts — Child learning

AMI Certified

Activity Guide

Step by Step to Mastery

5 steps to mastery

Start with larger minuends (18, 17) as these are typically introduced first

Encourage finger tracing along the chart lines to find answers

Some children benefit from saying the complete equation aloud

Self-correction builds confidence and independence

Work for 15-20 minutes or until natural interest wanes

Browse steps

Start with larger minuends (18, 17) as these are typically introduced first

Encourage finger tracing along the chart lines to find answers

Some children benefit from saying the complete equation aloud

Self-correction builds confidence and independence

Work for 15-20 minutes or until natural interest wanes

Developmental Benefits

Why Educators Choose This

Mathematical Memory

Systematic practice helps children internalize subtraction facts through repetition and self-correction.

Abstract Thinking

Transitions children from concrete materials to abstract number relationships and mental calculation.

Independence

Clear organization allows children to select, work through, and return materials autonomously.

Sequential Learning

Green indicators guide progression through increasingly complex subtraction combinations.

Observe which facts challenge each child and provide targeted practice with those specific slips

Create a recording system where children can track their progress through the complete set

Use the green line indicators to help children organize their work systematically on the table

Pro Tip

“Introduce problem slips only after the child has worked extensively with the Subtraction Strip Board and memorized some facts”

The Gold Standard in Montessori

Every Child Is a Little Creator

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Have Questions?

Frequently Asked Questions

Everything you need to know about this material.

Contact Our Experts

What are the green line indicators on these problem slips?

The green line indicators are visual guides that help children understand where to place their fingers or markers when working through subtraction problems on the working charts. They provide a systematic approach to solving equations and help children develop proper mathematical habits.

How do these problem slips complement the Subtraction Working Charts?

These problem slips work in conjunction with Montessori Subtraction Working Charts (sold separately). Children select a slip, find the corresponding equation on their working chart, and use the chart to discover the answer, creating a hands-on, self-correcting learning experience.

What is the progression of difficulty in these problem slips?

The slips are organized systematically, starting with simple subtraction facts (like 9-1) and progressing to more complex equations. This gradual progression allows children to build confidence while mastering all subtraction combinations from 18-1 through 18-9.

How do the clear acrylic storage boxes support the learning process?

The two clear acrylic boxes keep the problem slips organized and visible, allowing children to independently select and return materials. This promotes order, responsibility, and helps children see their progress as they work through different sets of equations.

When should children begin using these subtraction problem slips?

Children typically begin using these problem slips after they have worked extensively with concrete subtraction materials like the subtraction strip board and have been introduced to the subtraction working charts. This usually occurs around ages 4.5-6, though readiness varies by child.

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