Addition and Subtraction with Dienes within 100

Two-digit addition and subtraction within 100 with Dienes (base-ten) blocks: teaching pages and worksheets separate problems with no exchange from problems that need regrouping.
Year groups
Year 2 (Key Stage 1)
File type
PDF
Preparation
Print ready

Updated Oct 26, 2026

Subject
Subtraction, Addition, Addition and Subtraction, Maths
Topic
Maths Concepts, Addition
Resource types
Worksheets
Preparation
Print ready

From the author

About this resource

Addition and Subtraction with Dienes within 100: A Comprehensive Teaching Resource

The teaching resource named Addition and Subtraction with Dienes within 100 is a valuable asset for educators seeking creative ways to make maths concepts more conceptually accessible to their students. Specifically crafted for Year 2, this resource focuses on the key areas of addition and subtraction - core subjects that require a solid understanding for mathematical progression.

Making Maths Concepts Accessible:

This comprehensive package masterfully transitions your pupils from the physical world of mathematical tools like base-ten Dienes blocks, often used in early school years, into a visual and conceptual recognition. This vital leap enables students to move beyond basic tangible manipulations towards achieving proficiency with standard algorithms involved in addition and subtraction.

Incorporation of Base-Ten Dienes Blocks:

The included resources are meticulously designed, starting with calculations using rods to signify tens and units representing ones followed by introducing complex scenarios necessitating regrouping or borrowing while adding or subtracting respectively.

  • Accompanying worksheets mirror the interactive lessons: initial exercises focus on numbers whose sum falls below ten before advancing onto calculations requiring regrouping.
  • Similarly, children will learn subtraction methods that both avoid borrowing as well as employ it when necessary.

An Ever-ready Toolbox for Teachers:

As refreshing conveniences for teachers, this product is an ever-ready toolbox offering an unlimited number of randomised questions suitable not only for classwork but also homework assignments or even quick filler activities ensuring the complete assimilation of these concepts. Importantly too, should you need material ready at hand during those unavoidable supply teacher days - worry not! The no-preparation-needed feature ensures seamless continuity in learning.

Facilitating Constructive Learning:

For effective classroom implementation look towards the Self Checking Interactive Presentation included: primed ideally as an introductory tool prior to assigning worksheets providing immediate feedback when responses are inputted at the whiteboard by your students - promoting constructive learning through instant correction!

Concluding Remarks:

This educational resource, available as a PDF file, is reliant on Adobe Acrobat Reader for full functionality. Its array of formats: Whiteboard integrated lessons contributing to the broader pedagogy and diverse worksheets – ensure that educators and homeschoolers alike have the tools necessary to strengthen their students' understanding of addition and subtraction.

In the classroom

Teaching tips & learning objectives

Learning objectives

  • Add two-digit numbers within 100, with and without regrouping

  • Subtract two-digit numbers within 100, with and without borrowing

  • Use base-ten blocks to show tens and ones

Skills covered

  • Regrouping — exchanging ten ones for a ten, or a ten for ten ones, while solving two-digit problems

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Resource details

Concepts & topics

Core concepts

  • Base-ten blocks

  • Place value

  • Regrouping

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