Stress-Free Math

A Visual Guide to Acing Math in Grades 4-9

Theresa R. Fitzgerald

• Publisher: Routledge
• Year: 2021
• Print ISBN: 9781646320134
• eBook ISBN: 9781000503548
• Edition: 5
• Topic: Education
• Subtopic: Education General

Equipped with the #1 guide to help kids (and their parents) with math homework, students will be able to quickly find the definitions and illustrated examples that will enable them to solve many of the math challenges they face. Covering everything from "addend" to "zero, " Stress-Free Math:

• Is perfect for both kids and their parents looking for help with math homework and the tools to ace the class!
• Gives students in grades 4-9 more than 400 definitions, full-color illustrations, and examples.
• Covers subjects like measurement, algebra, geometry, fractions and decimals, statistics and probability, and problem solving.
• Helps students solve math problems with confidence.
• Is a fully updated reimagining of the best-selling Math Dictionary for Kids.

This well-organized and easy-to-follow quick reference guide includes illustrated, concise explanations of the most common terms used in general math classes. Packed with strategies to help students get better grades and master math concepts without any headaches, this math study guide also discusses how students can use manipulatives and basic math tools to improve their understanding and includes handy measurement conversion tables, guides to geometric shapes, and more. Each concept covered has a concise definition and an example or illustration.

Grades 4-9

Quick Reference Guides

DECIMALS

Adding Decimals

1. Line up the decimal points so that the place value is in line.
2. Add as normal. Zeros can be added after the decimal point in order to make adding easier, and it won’t change the answer.
3. Bring the decimal point straight down into the answer.

5 + .34 + 2.738 = 5.000 .340 + 2.738 8.078

.83 +4.2 = .83 + 4.20 5.03

.9+ 6+ .34 = .90 6.00 + .34 7.24

Comparing Decimals

To determine which decimal is larger or smaller, place value must be compared.

1. Line up the decimal points.
2. Compare tenths, then hundredths, and then thousandths.

1. Line up decimal points. $\frac{0.56}{0.324}$
2. Look at place value: 5 tenths is larger than 3 tenths, so 0.56 is larger than 0.324.

Converting Decimals

★ Decimal to Fraction

To change a decimal to a fraction, use place value.

1. Decide whether the decimal represents tenths, hundredths, thousandths, etc.
2. Write the numerical part of the decimal over the appropriate power of 10—over 10 if the decimal was in the tenths place, over 100 if the decimal was in the hundredths place, and so on.
3. Reduce the fraction.

Example:

.05 is 5 hundredths.

$$\frac{5}{100}\frac{5}{100}÷\frac{5}{5}=\frac{1}{20}$$

★ Decimal to Percent

To change a decimal to a percent, move the decimal point.

1. Move the decimal point two places to the right.
2. Add a percent sign (%).
3. Add zeros for placeholders if necessary.

Examples:

.72 = 72%	.8 = 80%
.523 = 52.3%	.09 = 9%

★ Fraction to Decimal

To find the decimal for a fraction: ⅜

1. Divide the numerator by the denominator.
   $$8\overline{)3}$$
2. Add a decimal point and zeros to the dividend. Bring the...

Table of contents

• Cover
• Half Title
• Title Page
• Copyright Page
• Dedication Page
• Table of Contents
• Introduction
• Visual Definitions by Topic
• Quick Reference Guides
• Index
• About the Author