# Rational and irrational numbers

8 videos

6 skills

More numbers than you probably imagine can be represented as the ratio of two integers. We call these rational numbers. But there are also really amazing numbers that can't. As you can guess, we call them irrational numbers.
Common Core Standards: 8.NS.A.1, 8.NS.A.2

### Introduction to rational and irrational numbers

VIDEO
5:55 minutes

### Converting decimals to fractions 2 (ex 1)

VIDEO
1:14 minutes

### Converting decimals to fractions 2 (ex 2)

VIDEO
2:11 minutes

### Converting decimals to fractions 2

PRACTICE PROBLEMS

Convert a decimal to an equivalent fraction. Convert a decimal to an equivalent mixed number.

### Converting a fraction to a repeating decimal

VIDEO
4:25 minutes

### Writing fractions as repeating decimals

PRACTICE PROBLEMS

### Converting repeating decimals to fractions 1

VIDEO
4:03 minutes

Examples of how to convert basic repeating decimals to fractions

### Converting 1-digit repeating decimals to fractions

PRACTICE PROBLEMS

Convert 1-digit repeating decimals to fractions

### Converting repeating decimals to fractions 2

VIDEO
9:06 minutes

Converting more interesting repeating decimals to fractions

### Converting multi-digit repeating decimals to fractions

PRACTICE PROBLEMS

Convert multi-digit repeating decimals to fractions

### Recognizing irrational numbers

VIDEO
2:18 minutes

### Recognizing rational and irrational numbers

PRACTICE PROBLEMS

### Approximating irrational number exercise example

VIDEO
3:36 minutes

### Approximating irrational numbers

PRACTICE PROBLEMS