# Number System – Unit 1

Unit 1 focuses on number system fluency.  Students can expect problems that involve adding, subtracting, multiplying, and dividing fractions, decimals, and whole numbers. Much of unit one is a review of concepts from 5th grade, but the problems will be more complex.

Here is the Cobb County Schools parent letter for Unit 1:

M6U1 Parent Letter-1ud30gx

Here are helpful video links, organized by concept.  Use these to preview, review, and study!

### Whole Number Operations:

Multi Digit Multiplication – Standard Algorithm

Long Division

Turning a Whole Number Remainder Into a Decimal

### Decimal Operations:

Decimal Place Value

Decimal Arithmetic

Adding and Subtracting Decimals

Multiplying Decimals

Converting a Fraction to a Decimal

### Operations with Fractions:

Adding and Subtracting Fractions

Adding and Subtracting Fractions

Adding and Subtracting Mixed Numbers

Multiplying Fractions

Multiplying Mixed Numbers

Dividing Fractions

Dividing Mixed Numbers