Chapter 8.1, Problem 76CCR

To determine

The value of the expression $3^3+7\left(4\right)$

Answer to Problem 76CCR

The value of the expression is $55$

Explanation of Solution

Given:

  $3^3+7\left(4\right)$

Concept Used:

Rules of Addition/ Subtraction:

• Two numbers with similar sign always get added and the resulting number will carry the similar sign.
• Two numbers with opposite signs always get subtracted and the resulting number will carry the sign of larger number.

Rules of Multiplication/ Division:

• The product/quotient of two similar sign numbers is always positive.
• The product/quotient of two numbers with opposite signs is always negative.

Calculation:

  $3^3+7\left(4\right)$

  $\begin{array}{c}{3}^3=3\ast 3\ast 3=27\\ \text{So the experssion will become}\\ 3^3+7\left(4\right)\\ =27+28\\ =55\end{array}$

Thus, the value of the expression is $55$