What is 8+{-10-[-4-(-2+1-9)]}+7 ?

The solution to 8+{-10-[-4-(-2+1-9)]}+7 is -1

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8+{-10-[-4-(-2+1-9)]}+7

8 + {- 10 - [- 4 - (- 2 + 1 - 9)]} + 7

- 1

Solution steps

8 + {- 10 - [- 4 - (- 2 + 1 - 9)]} + 7

Follow the PEMDAS order of operations

Calculate within parentheses

{- 10 - [- 4 - (- 2 + 1 - 9)]} : - 16

= 8 - 16 + 7

Add and subtract (left to right)

8 - 16 + 7 : - 1

= - 1

3 - \frac{2}{3} - \frac{7}{9}

2 (2) + 1

(- 2)^{2} - 1

- 2 \times 3 - 4 \div 2 - 2

\frac{5}{6} - \frac{1}{2} + 2 - \frac{1}{3}