Question

1. evaluate: $90 - 6(9) + 27 div 3^2$

Explanation:

Step1: Calculate exponents

$3^2 = 9$

Step2: Compute multiplication/division

$6(9) = 54$, $\frac{27}{9}=3$

Step3: Left-to-right addition/subtraction

$90 - 54 +3 = 36 +3$

Answer:

$39$