# CCSS Math 8.NS - Number Sense or The Number System

Get Started. It's Free CCSS Math 8.NS - Number Sense or The Number System ## 3. 8.NS.2: Use rational approximations of irrational numbers to compare the size of irrational numbers, locate them approximately on a number line diagram, and estimate the value of expressions (e.g., π^2).

### 3.1. F.15: Exponents and roots: Estimate positive and negative square roots

3.1.1. Practice on IXL (S)

### 3.2. F.19: Exponents and roots: Estimate cube roots

3.2.1. Practice on IXL (S)

### 3.3. CCSS Math 8.NS.2 (T,S)

3.3.1. MasteryConnect 8.NS.2 (T)

3.3.1.1. ExamView Dynamic Questions (T)

3.3.1.1.1. Clicker questions (T)

## 4. 8.NS.1: Know that numbers that are not rational are called irrational. Understand informally that every number has a decimal expansion; for rational numbers show that the decimal expansion repeats eventually, and convert a decimal expansion which repeats eventually into a rational number.

### 4.1. D.1 Rational numbers: Identify rational and irrational numbers

4.1.1. Practice (S)

4.1.1.1. Tutorial video (Khan Academy): Rational and Irrational Numbers (S)

### 4.2. D.6: Rational numbers: Convert between decimals and fractions or mixed numbers

4.2.1. Practice (S)

### 4.3. CCSS Math 8.NS.1 (T,S)

4.3.1. MasteryConnect 8.NS.1 (T)

4.3.1.1. ExamView Dynamic Questions (T)

4.3.1.1.1. Clicker questions (T)