#### Basic Arithmetic

Enter the numbers and operation symbols in order, using the order of operations.

**Example**: (5 − 2) × −7 =

Answer: −21

#### Percentages

To enter a percentage, enter the number and then 2nd, left parenthesis. The 2nd key gives you the second function of a key—that’s the small green symbol at the top of the key.

**Example:** 65% × 150 =

Answer: 97.5

#### Scientific Notation

To enter scientific notation, use the ×10^{n} key.

**Example:** 2.3 × 10^{4} + 6.7 × 10^{4} =

Answer: 90,000

#### Fractions

To enter fractions, use the (numerator over denominator) key. The calculator will give you the answer as a reduced fraction.

**Example:** ^{2}/_{3} ∶ ^{1}/_{2}

Answer: 1^{1}/_{3}

#### Mixed Numbers

To enter mixed numbers, first enter the whole number, then use 2nd and the fraction key to begin the fraction part of the number.

**Example:** 8^{3}/_{4} × 1^{1}/_{2} =

Answer: 10(1/4)

#### Powers

To enter a number squared, use the x^{2} key.

**Example:** 6.1^{2} =

Answer: 37.21

**Example:** 2^{8} =

Answer: 256

#### Roots

To enter a square root, use 2nd and the x^{2} key.

**Example:** √676

Answer: 26

**Example:** ∛729

Answer: 9

#### Toggle Key

Use the answer toggle key to change an answer between fraction and decimal, square root and decimal, or pi and decimal.

**Example:** ^{19}/_{20} =

Answer: 0.95