+0

0
73
1

The expression$$23-4\cdot7-5$$  is equal to -10 However, we can obtain values different than -10 by inserting a single set of parentheses. For example, we can insert parentheses around 23-4 and get:

\begin{align*} (23-4)\cdot7-5.\end{align*}

Find how many values can be obtained in total in this way, including -10.

Note: inserting parentheses so there is implied multiplication is not allowed. For example:

$$2(3-4\cdot7)-5$$

should not be counted.

Dec 20, 2020

#1
0

including the original expression there are 4  different values possible.

Feb 11, 2021