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Singapore Math Dimensions Math Textbook 7A

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Singapore Math Dimensions Math Textbook 7ADimensions Math Textbook 7A Chapter 1: Factors and Multiples 1. 1 Factors and Multiples A. Factors B. Multiples 1. 2 Prime Factorization and Exponential Notation A. Prime Factorization B. Exponential Notation 1. 3 Greatest Common Factor (GCF) 1. 4 Least Common Multiple (LCM) 1. 5 Square Roots and Cube Roots A. Square Roots B. Cube Roots In A Nutshell Extend Your Learning Curve Write In Your Journal Chapter 2: Real Numbers 2. 1 Idea of Negative Numbers

Dimensions Math® Textbook 7A

Chapter 1: Factors and Multiples

1.1 Factors and Multiples

A. Factors
B. Multiples

1.2 Prime Factorization and Exponential Notation

A. Prime Factorization
B. Exponential Notation

1.3 Greatest Common Factor (GCF)
1.4 Least Common Multiple (LCM)
1.5 Square Roots and Cube Roots

A. Square Roots
B. Cube Roots

In A Nutshell
Extend Your Learning Curve
Write In Your Journal

Chapter 2: Real Numbers

2.1 Idea of Negative Numbers and the Number Line

A. Negative Numbers
B. The Number Line
C. Absolute Value

2.2 Addition and Additive Inverse

A. Addition of Integers
B. Additive Inverse

2.3 Subtraction and Absolute Value of the Difference

A. Subtraction of Integers
B. Absolute Value of the Difference

2.4 Multiplication, Division, and Combined Operations of Integers

A. Multiplication of Integers
B. Division of Integers
C. Combined Operations of Integers

2.5 Rational Numbers

A. Definition
B. Addition and Subtraction of Rational Numbers
C. Multiplication and Division of Rational Numbers

2.6 Real Numbers and Use of Calculators

A. Real Numbers
B. Use of Calculators

2.7 Rounding Numbers to Decimal Places

A. Idea of Rounding
B. Rounding Numbers to Decimal Places

In A Nutshell
Extend Your Learning Curve
Write In Your Journal

Chapter 3: Introduction to Algebra

3.1 The Use of Letters in Algebra

A. The Use of Letters
B. Basic Notations in Algebra
C. Exponential Notation

3.2 Evaluation of Algebraic Expressions and Formulas

A. Evaluation of Algebraic Expressions
B. Formulas

3.3 Writing Algebraic Expressions to Represent Real-world Situations

In A Nutshell
Extend Your Learning Curve
Write In Your Journal

Chapter 4: Algebraic Manipulation

4.1 Like Terms and Unlike Terms
4.2 Distributive Law, Addition and Subtraction of Linear Algebraic Expressions

A. Use of Parentheses
B. Addition and Subtraction of Linear Algebraic Expressions

4.3 Simplification of Linear Algebraic Expressions
4.4 Factorization by Extracting Common Factors
4.5 Factorization by Grouping Terms

In A Nutshell
Extend Your Learning Curve
Write In Your Journal

Chapter 5: Simple Equations in One Variable

5.1 Simple Linear Equations in One Variable
5.2 Equations Involving Parentheses
5.3 Simple Fractional Equations
5.4 Forming Linear Equations to Solve Problems

In A Nutshell
Extend Your Learning Curve
Write In Your Journal

Chapter 6: Ratio, Rate, and Speed

6.1 Ratios Involving Rational Numbers

A. Meaning of Ratio
B. Simplification of Ratios
C. Ratio of Three Quantities
D. Problems Involving Ratios

6.2 Average Rate
6.3 Speed

A. Uniform Speed and Average Speed
B. Conversion of Units

In A Nutshell
Extend Your Learning Curve

Chapter 7: Percentage

7.1 Meaning of Percentage

A. Introduction
B. Expressing One Quantity as a Percentage of Another

7.2 Reverse Percentages
7.3 Percentage Increase and Decrease

A. Percentage Increase
B. Percentage Decrease

7.4 Discount and Sales Tax

A. Discount
B. Sales Tax

In A Nutshell
Extend Your Learning Curve
Write In Your Journal

Chapter 8: Angles, Triangles, and Quadrilaterals

8.1 Points, Lines, and Planes
8.2 Angles

A. Angles and Measurements
B. Types of Angles
C. Complementary, Supplementary, and Adjacent Angles
D. Properties of Angles

8.3 Perpendicular Bisectors and Angle Bisectors

A. Use of Compasses
B. Perpendicular Bisectors
C. Angle Bisectors

8.4 Triangles

A. Classification of Triangles
B. Construction of Triangles

8.5 Quadrilaterals

A. Types of Quadrilaterals
B. Properties of Special Quadrilaterals
C. Construction of Quadrilaterals

In A Nutshell
Extend Your Learning Curve
Write In Your Journal

Answers 

Note: The answer key in the first printing of Textbook 7A has some errors in it. Please download revised key from here. Please note that not all the answers are incorrect in the first printing answer key, and incorrect answers are highlighted in this corrected answer key. We apologize for the inconvenience caused. 

Click here to view Dimensions Math® Textbook 7A samples

 

Dimensions Math® G6-8 Textbooks are designed for middle school students. Developed in collaboration between Star Publishing and Singapore Math Inc®, this series follows the Singapore Mathematics Framework and covers the topics in the Common Core State Standards.

The emphasis of this series is on empowering the students to learn mathematics effectively and independently. Depending on the topics covered, different approaches are adopted for the presentation of concepts to facilitate easy understanding by students to internalize concepts and instill in them an interest to explore the topics further.

Each book includes appropriate examples, class activities and diagrams to understand the concepts and apply them. IT skills and values are incorporated as appropriate.

Some features of this series include the following:

  1. Class activities which allow the student to learn mathematics through discovery. Some of the class activities make use of Geometer’s Sketchpad (available at keypress.com).
  2. Worked examples are followed by a similar question (Try It!) so that students can check if they have understood the concepts presented earlier.
  3. An exercise for each lesson including questions in the following sequence:
    • Basic Practice (simple questions involving a direct application of the concepts)
    • Further Practice (more challenging questions on direct application)
    • Maths@Work (questions that apply mathematical concepts to real-life situations)
    • Brainworks (questions involving higher order thinking or an open-ended approach to problems)
  4. Each chapter is followed by a review exercise; the Extend Your Learning Curve activity encourages students to explore mathematical concepts further or apply mathematics in real-life situations, with some questions requiring sentence or paragraph answers to encourage students to reflect on their learning experiences.
  5. The right margins contain remarks on important information, concepts or definitions covered earlier related to the current material to help students recall them, discussion questions, interesting puzzles or facts that are related to mathematics, and some website references.

The answer key at the back of the book provides answers to the Try It! and the problems in the exercises for the Basic PracticeFurther Practice, and Maths@Work questions. It does not include answers to the class activities or the Extend Your Learning Curve activities. 

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Jonathan Vaughan
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I have tried a plethora of non-pharmaceutical anxiolytics, and I can say that CalmAid is by far the most effective. For me, the effects are comparable to a low dose of Ativan, but without the drugged feeling. Here are the main things I notice: -Relaxed heartbeat. My heartbeat is usually very pronounced, but when I take lavender, it calms down dramatically. -Quieter thoughts. I don't know how to describe this except to say that the "volume" of my thoughts is turned way down on lavender. -Tremendous sense of calm. It's very hard to get upset or agitated or anxious while under lavender's influence. -Improved sleep. I've suffered from horrible insomnia for a long time, and lavender is one of the only remedies that's had a noticeable effect. It doesn't make me drowsy per se, but it makes me so calm and relaxed that sleeping is easier. However, there are some "side effects" (I use the term loosely) to be aware of when using this: -Reduced energy. I suspect this is just the lavender calming my stress response and revealing fatigue that's already present to some degree, but it's worth noting. As I mentioned, lavender doesn't make me tired, but it makes me just want to kick back and chill rather than doing anything very active or exciting. -Reduced motivation. Tying into the above, when using lavender I would often rather relax and watch a movie or read instead of getting work done. This is, I suspect, the dark side to being incredibly calm, whether it's lavender or something else making you that way. When you're calm, nothing seems to matter that much, including work. Ergo, you have less motivation. I think a certain amount of anxiety is healthy for optimal motivation, and lavender does away with that. -For these reasons, I don't consider lavender an optimal anxiolytic for social anxiety, because energy and motivation are so important in social situations. I suffer from social anxiety, and have used lavender to deal with this at times, and though it does make me less anxious, it also makes me less social. I'd recommend something more like phenibut for social situations. Despite these limitations, I still consider this an essential component in my anti-anxiety toolkit. I just try not to use it too often. Also, it's worth noting that human studies on lavender are somewhat lacking, and without more data, we don't know what the long-term effects of using it are. As with any drug (and I do consider this a drug), I think it should be used as little as possible. I would, however, much rather use this than a pharmaceutical anxiety medication. A final note, on when to take it: I've found the best time to be 30 minutes before bed, on an empty stomach. The effects are more dramatic when taken well away from food, and if you take it before bed, you get the sleep-enhancing effects immediately, and the anxiolytic effects all throughout the next day (it lasts a looong time).
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Reviewed in the United States on November 2, 2017
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Reviewed in the United States on August 1, 2025
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Day 1 and A Week ish Later
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I was taking Olly Stress Relief gummies for a while to control anxiety, hyperactivity and racing thoughts, and they worked great. Recently I noticed that they were becoming a lot less effective and started searching for alternatives. This was my first choice and I've only used it this morning. Took one pill. So far I have noticed a lighter mood, lack of racing thoughts, and an overall feeling of being slowed down. I can focus on conversations better, and it slightly enhanced my ability to taste, flavors seem more vibrant.. I am a bit more "lazy feeling" as others mentioned, and I did get the lavender burps. They're not horribly obnoxious for me, just a bit different. Burps lasted maybe half an hour. So far I like it. Edit: it's been over a week now. The first few days I dealt with random headaches on and off, but did get benefits as stated above. After my body adjusted I stopped having the headaches and the "lazy" feeling. The lavender burps are still a thing and so is short term lavender breath right after taking a pill. You can describe it like a light lingering, kinda like toothpaste has a minty aftertaste, but lavender instead. For the most part I would still say it helps. It does not hit as hard as the first few days, but it is helping somewhat. Benefits for me: Less overstimulation in public, better ability to relax after work, anxiety is more "inconvenience", easier to focus, deeper sleep, less irritability. Cons for me: Short term lavender breath, vivid and unusual dreams, 2-3 day initial adjustment period for unpleasant side effects. What I'm doing: Taking one pill around 7-7:30pm daily with lots of water. Taking late to sleep off any potential unpleasant initial effects, and get better sleep.
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Reviewed in the United States on August 31, 2024

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