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Evaluate -1/2-2

Solution

- 1/2 - 2

- \frac{5}{2}

Decimal

- 2.5

Solution steps

- 1/2 - 2

Follow the PEMDAS order of operations

Multiply and divide (left to right)

- 1/2 : \frac{- 1}{2}

- 1/2

- 1/2 = \frac{- 1}{2}

= \frac{- 1}{2}

= \frac{- 1}{2} - 2

Add and subtract (left to right)

\frac{- 1}{2} - 2 : - \frac{5}{2}

\frac{- 1}{2} - 2

\frac{- 1}{2} - 2 = - \frac{5}{2}

\frac{- 1}{2} - 2

Apply the fraction rule:

\frac{- a}{b} = - \frac{a}{b}

= - \frac{1}{2} - 2

Convert element to fraction:

2 = \frac{2 \cdot 2}{2}

= - \frac{2 \cdot 2}{2} - \frac{1}{2}

Since the denominators are equal, combine the fractions:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{- 2 \cdot 2 - 1}{2}

- 2 \cdot 2 - 1 = - 5

- 2 \cdot 2 - 1

Multiply the numbers:

2 \cdot 2 = 4

= - 4 - 1

Subtract the numbers:

- 4 - 1 = - 5

= - 5

= \frac{- 5}{2}

Apply the fraction rule:

\frac{- a}{b} = - \frac{a}{b}

= - \frac{5}{2}

= - \frac{5}{2}

= - \frac{5}{2}

\frac{75}{6}

\frac{150}{4}

30 - 24

t o a p erce n t a g e 2/16

\frac{9}{50}