# Tag: numbers

### Ordering of Real Numbers – Lesson 1.3

This lesson shows how to order numbers (fractions, decimals, irrational, etc). Read more: youtube.com

### Scientific Notation with Positive Powers of 10 – Lesson 2.2

This lesson shows how to write very large numbers in Scientific Notation. Read more: youtube.com

### Scientific Notation with Negative Powers of 10 – Lesson 2.3

This lesson writes very small numbers using Scientific Notation. Read more: youtube.com

### Adding Rational Numbers – Lesson 3.2

Here we add rational numbers that have the same sign, and add rational numbers that have different signs. Number lines are useful to help us understand these. Read more: youtube.com

### Generating Equivalent Expressions – Lesson 10.3

Here, we plug in numbers, use algebra tiles, and properties of equality to see which expressions are equivalent. Read more: youtube.com

### Modeling and Writing Expressions – Lesson 10.1

This lesson uses variables for unknown numbers to write algebraic expressions. Read more: youtube.com

### Break Apart 3-Digit Addends – Lesson 6.2

This lesson shows how to break apart 3-digit numbers into hundreds, tens, and ones. Then we add each group to get a whole. Read more: youtube.com