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💙 Over 450 ready-to-use materials aligned with the BNCC. 💙 10% OFF - ON YOUR FIRST PURCHASE, COUPON: BEMVINDO • Less time preparing materials, more attention to your students' needs. Over 50,000 teachers visited AdaptEdu this year. 💙 Over 450 ready-to-use materials aligned with the BNCC. 💙 10% OFF - ON YOUR FIRST PURCHASE, COUPON: BEMVINDO • Less time preparing materials, more attention to your students' needs. Over 50,000 teachers visited AdaptEdu this year. 💙 Over 450 ready-to-use materials aligned with the BNCC. 💙 10% OFF - ON YOUR FIRST PURCHASE, COUPON: BEMVINDO • Less time preparing materials, more attention to your students' needs. Over 50,000 teachers visited AdaptEdu this year. 💙 Over 450 ready-to-use materials aligned with the BNCC. 💙 10% OFF - ON YOUR FIRST PURCHASE, COUPON: BEMVINDO • Less time preparing materials, more attention to your students' needs. Over 50,000 teachers visited AdaptEdu this year. 💙 Over 450 ready-to-use materials aligned with the BNCC. 💙 10% OFF - ON YOUR FIRST PURCHASE, COUPON: BEMVINDO • Less time preparing materials, more attention to your students' needs. Over 50,000 teachers visited AdaptEdu this year.
Operations with Decimal Numbers: Addition and Subtraction (with Summary) - Foundational Numeracy
Home . Adapted Activities . Matemática . Operations with Decimal Numbers: Addition and Subtraction (with Summary) - Foundational Numeracy

Operations with Decimal Numbers: Addition and Subtraction (with Summary) - Foundational Numeracy

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Description

6 adapted questions + complete answer key, distributed across 2 activity pages, with an introductory visual summary and worked examples.

The sequence begins by adding prices, progresses to combining monetary values using coins and vertically arranged calculations, and concludes with a subtraction problem involving change from a purchase.

Target audience:

Especially suitable for students who are in the process of learning to read and write, and can be used in Elementary School, Middle School, and High School, depending on the student's curricular adaptation needs.

It may be particularly helpful for students with:

  • Mild to moderate Intellectual Disabilities who can already recognize numbers and quantities but need visual support and concrete examples.

  • Significant reading and writing difficulties who benefit from short instructions and reduced writing demands.

  • Attention and mathematical organization difficulties who need structured calculations and step-by-step guidance.

The material can also support Mathematics and Specialized Educational Support (AEE) teachers.

Format:

Ready-to-print PDF containing:

🔹 6 adapted questions and a complete answer key; 🔹 2 activity pages, including an introductory visual summary; 🔹 illustrated explanations of decimal numbers, addition, and subtraction; 🔹 worked examples for reference; 🔹 images of school supplies, coins, and everyday products; 🔹 multiple-choice and calculation completion activities; 🔹 vertically arranged mathematical operations; 🔹 versions with standard lettering and UPPERCASE lettering; 🔹 black-and-white version; 🔹 BNCC-related skills.

⏱️ Save approximately 2 hours and 55 minutes of preparation time! The material is already adapted, illustrated, formatted, and accompanied by a complete answer key, reducing the time needed to develop examples, organize calculations, and prepare visual resources.

Content covered:

  1. Decimal numbers: Recognizing monetary values written using decimal commas.

  2. Adding prices: Adding R$ 1.50 and R$ 2.00 to obtain a total of R$ 3.50.

  3. Adding coins: Recognizing that two R$ 0.50 coins equal R$ 1.00.

  4. Adding product prices: Calculating the total cost of a bottle of water and a package of cookies.

  5. Vertical calculations: Solving decimal addition problems, such as 3.00 + 1.00 and 3.20 + 1.10.

  6. Subtraction and making change: Interpreting a shopping situation involving payment and the amount of change to be returned.

The introductory summary explains that addition means combining quantities and subtraction means taking one quantity away from another, using products and monetary values to illustrate these operations.

Important information for teachers:

The activity follows a progressive learning sequence, beginning with image-supported operations and gradually introducing structured numerical calculations.

In the first question, students observe a pencil and an eraser priced at R$ 1.50 and R$ 2.00, identify the total, and complete the given addition problem.

In the second question, students add two 50-cent coins, connecting the combination of monetary values to decimal notation.

In the third question, students observe the prices of a bottle of water and a package of cookies and complete the addition 2.50 + 2.00, selecting the correct result from four answer choices.

In questions 4 and 5, students solve vertically arranged calculations, beginning with whole-number amounts written in decimal form and progressing to addition involving reais and cents.

In the sixth question, students interpret a shopping and payment situation to explore the concept of making change. The question can be completed with teacher guidance to reinforce the relationship between the amount paid, the product price, and the change returned.

The visual summary allows students to refer to worked examples while completing the questions, supporting their understanding of mathematical procedures without relying exclusively on memorization.

Key features:

✅ Introductory visual summary: Explanations and worked examples of addition and subtraction.

✅ Functional Mathematics: Operations connected to shopping, coins, and prices.

✅ Progressive learning: From simple addition to vertically arranged calculations.

✅ Support for mathematical organization: Structured calculations and spaces to complete results.

✅ Reduced writing demands: Answers selected by marking and short numerical entries.

✅ Accessibility: Available in UPPERCASE and black-and-white versions, with a complete answer key.