Question

Calculate the value of the expression

1.) 18/3+2(12-5)
a) 33 1/3
b)10 2/3
c) 40
d)56
e)20

2.) 30+4(4+1)/2 -2(3+1)
a)77
b)46
c)92
d)21
e)17

Answer 1

1. e

Explanation:

18/3 +2(12-5)

=6+2(7)

=6+14

=20

Answer 2

===> Exercise 1

`\large\displaystyle\text{$\begin{gathered}\sf (18)/(3)+2(12-5) \end{gathered}$}`

Divide 18 by 3 to get 6.

• 
  `\large\displaystyle\text{$\begin{gathered}\sf 6+2(12-5) \ \to \ [Subtract] \end{gathered}$}`

• 
  `\large\displaystyle\text{$\begin{gathered}\sf 6+2*7 \ \to \ \ [Multiply] \end{gathered}$}`
• 
  `\large\displaystyle\text{$\begin{gathered}\sf 6+14 \ \to \ \ [Add] \end{gathered}$}`
• 
  `\boxed{\large\displaystyle\text{$\begin{gathered}\sf 20 \end{gathered}$} }`

Therefore, the correct option is "E".

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===> Exercise 2

`\large\displaystyle\text{$\begin{gathered}\sf 30+(4(4+1))/(2)-(3+1) \ \to \ \ [Add \ 4 \ plus \ 1] \end{gathered}$}`

• 
  `\large\displaystyle\text{$\begin{gathered}\sf 30+(4*5)/(2)-(3+1) \ \to \ \ [Multiply \ 4 \ by \ 5] \end{gathered}$}`

• 
  `\large\displaystyle\text{$\begin{gathered}\sf 30+(20)/(2)-(3+1) \ \to \ \ [Divide \ 20 \ by \ 2] \end{gathered}$}`

• 
  `\large\displaystyle\text{$\begin{gathered}\sf 30+10-2(3+1) \ \to \ [Add \ 30 \ and \ 10] \end{gathered}$}`

• 
  `\large\displaystyle\text{$\begin{gathered}\sf 4-2(3+1) \ \to \ [Add \ 3 \ and \ 1] \end{gathered}$}`

• 
  `\large\displaystyle\text{$\begin{gathered}\sf 40-2*4 \ \ \to \ \ [Multiply \ 2 \ and \ 4.] \end{gathered}$}`

• 
  `\large\displaystyle\text{$\begin{gathered}\sf 40-8 \ \ \to \ [Subtract] \end{gathered}$}`

• 
  `\boxed{\large\displaystyle\text{$\begin{gathered}\sf 32 \end{gathered}$} }`

It seems that none of the options is correct.