# Ch 1: 4th Grade Math: Numbers & Number Sense

### About This Chapter

## 4th Grade Math: Numbers & Number Sense - Chapter Summary

Make sure 4th grade students possess a strong foundation in mathematics by having them look through this chapter on numbers and number sense. There are many topics to cover in this chapter, which is why our instructors have made things easier by separating the chapter into several smaller lessons. Each lesson discusses a single topic, so your students are less likely to get information overload as they go through our materials. In addition, our well-labeled lessons are easy to navigate, allowing your students to find the exact lesson topic they need to study.

## Chapter Topics

- Understanding and writing numbers up to 9 digits
- Trillions place value for decimals
- Comparing and ordering numbers as high as a trillion
- Recording numbers in expanded form
- Using a number line to graph rational numbers
- Rounding whole numbers
- Rounding to the closest 1,000, 10,000, and 100,000
- Square roots up to 144 and perfect squares
- Recognizing Roman numerals for 100-10,000
- Composite and prime numbers
- Identifying the greatest common factor
- The rules and definition of a mathematical pattern

### 1. How to Read & Write Numbers Up to Nine Digits: Lesson for Kids

Do you know how to read and write large numbers, like the population of the United States? Find out how in this lesson, which shows you how to use place value and periods to tackle big numbers.

### 2. Decimal Place Value to the Trillions

Really large numbers, like those in the trillions, can sometimes be confusing. In this lesson, learn about the details of decimal place value, which can help us organize and recognize numbers and find out how to name place value up to the trillions.

### 3. How to Order & Compare Numbers up to a Billion: Lesson for Kids

Comparing numbers is a very important skill. In this lesson, you will learn how to compare numbers by looking at their individual digits. You will also be able to decide if one number is equal to (=), greater than (>), or less than (<) another number.

### 4. How to Write Numbers in Expanded Form

Have you ever thought about how numbers are said and written? In this lesson, we will learn how to write numbers in expanded form so that you understand the value of each digit within the number.

### 5. Graphing Rational Numbers on a Number Line

Number lines have many uses both in mathematics and everyday life. This lesson will teach you how to graph numbers on a number line and give real-world examples of how to use number lines.

### 6. How to Round Whole Numbers

View this lesson to learn how you can round whole numbers. Practice rounding to the nearest tens and hundreds. Learn which digit you need to look at to know whether to round up or down.

### 7. Rounding Numbers to the Nearest 1000, 10,000 & 100,000

After watching this video lesson, you will be able to round larger numbers like a pro. Learn what the cutoff numbers are for rounding up and down to the nearest thousand, ten thousand and hundred thousand.

### 8. Perfect Squares & Square Roots up to 144: Lesson for Kids

Many numbers in math are related. For example, you know that the opposite of addition is subtraction and they can create a math family. Well, perfect squares and square roots are also related - so if you learn one, you then know both! Let's find out how!

### Perfect Squares List & Flashcards

Do you want to know the perfect square of many different numbers? Perfect squares are commonly used in Algebra. This flashcard set includes the perfect square of numbers 1 through 30.

### 10. Writing Roman Numerals for 100-10,000

Have you ever seen a bunch of random letters and wondered what they represent? Sure, it could have been gibberish, but it also may have been Roman numerals. This lesson will teach you all you need to know to write Roman numerals 100 through 10,000.

### 11. Identifying Prime & Composite Numbers

In this video lesson, you will learn how to identify both prime and composite numbers. You will also learn what makes the numbers unique, as well as the characteristics of both these types of numbers.

### 12. How to Find the Greatest Common Factor

If the factors of a number are the different numbers that you can multiply together to get that original number, then the greatest common factor of two numbers is just the biggest one that both have in common. See some examples of what I'm talking about here!

### 13. What is a Pattern in Math? - Definition & Rules

Some people say that doing the same thing over and over again will not get you results, but this lesson will teach you about mathematical patterns and show you how to prove those people wrong.

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### Other Chapters

Other chapters within the 4th Grade Math course

- Multiples of Whole Numbers
- 4th Grade Math: Understanding Fractions
- 4th Grade Math: Understanding Decimals
- 4th Grade Math: Addition & Subtraction
- 4th Grade Math: Multiplication Strategies & Mental Math
- 4th Grade Math: Understanding Division
- 4th Grade Math: Arithmetic With Money
- 4th Grade Math: Word Problems & Equations
- 4th Grade Math: Lines, Angles & Shapes
- 4th Grade Math: Measurement Units & Conversions
- 4th Grade Math: Measurement Problems
- 4th Grade Math: Representing Data