What is 18\div 2-[2\times (-9)] ?

The solution to 18\div 2-[2\times (-9)] is 27

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18\div 2-[2\times (-9)]

18 \div 2 - [2 \times (- 9)]

27

Solution steps

18 \div 2 - [2 \times (- 9)]

Follow the PEMDAS order of operations

Calculate within parentheses

[2 \times (- 9)] : - 18

2 \times (- 9)

Apply rule

a \times (- b) = - a \times b

2 \times (- 9) = - 2 \times 9 = - 18

= - 18

= 18 \div 2 - (- 18)

Multiply and divide (left to right)

18 \div 2 : 9

18 \div 2

18 \div 2 = 9

= 9

= 9 - (- 18)

Add and subtract (left to right)

9 - (- 18) : 27

9 - (- 18)

Apply rule

- (- a) = + a

- (- 18) = + 18

= 9 + 18

9 + 18 = 27

= 27

= 27

- (1)^{2} + 2 (1)

5 (- 1)^{6}

\frac{2 ( 2 ) ^{3}}{3}

\frac{4 ^{2} - 4}{4 - 2}

12 (1)^{2} - 6 (1)