Question

SHOW ALL THE STEPS TO SIMPLIFICATION1. 16-20÷42. 12+4×53. 32÷8×44. 27÷3^35. [16-20]÷46. $\frac{ - 20 + 8} { - 4}$7. -(2-4)^58. 9-3^2

Answer 1

To solve these expressions you have to apply the order of operations known as PEMDAS which stands for Parentheses, Exponent Multiplication/Division, Addition/Subtraction.→ first solve the terms on parentheses, then the exponents, then the multiplications/divisions and finally the aditions or subtractions.

1.

$16-20\div4$

The Division must be solve first:

$\begin{gathered} 16-20\div4 \\ 16-5 \end{gathered}$

Next solve the subtraction

$16-5=11$

2.

$12+4\cdot5$

First operation to solve is the multiplication:

$\begin{gathered} 12+4\cdot5 \\ 12+20 \end{gathered}$

Next solve the addition

$12+20=32$

3.

$32\div8\cdot4$

First solve the division

$32\div8=4$

Then solve the multiplication

$4\cdot4=16$