# What is 7 - 25 + 6 -: 2 xx 25? color(white)("mmm") Edited by Tony B:color(white)(..)Changed 2 star 25 for multiply to 2 x 25

Apr 5, 2016

The answer is $57$.

#### Explanation:

Let's use the PEMDAS method.

If there are operations with the same priority (multiplication and division or addition and substraction) you calculate them from left to right so:

1. First we divide $6$ by $2$.

2. Next we multiply the result $3$ by $25$

3. Now we have only addition and substraction so we calculate them from left to right:

$7 - 25 + 75 = - 18 + 75 = 57$

$7 - 25 + 6 \div 2 \cdot 25 = 7 - 25 + 3 \cdot 25 = 7 - 25 + 75 = - 18 + 75 = 57$

Sep 4, 2016

$57$

#### Explanation:

Identify the number of terms first. Reduce each term to a single answer by following the order of operation from strongest to weakest within each term. Brackets must be done first., then

powers and roots, then multiplication and division.

$\textcolor{t e a l}{7} \textcolor{b l u e}{- 25} + \textcolor{red}{6 \div 2} \times 25$

=$\textcolor{t e a l}{7} \textcolor{b l u e}{- 25} + \textcolor{red}{3} \times 25$

=$\textcolor{t e a l}{7} \textcolor{b l u e}{- 25} + \textcolor{red}{3} \times 25$

=$\textcolor{t e a l}{7} \textcolor{b l u e}{- 25} + \textcolor{red}{75}$

It is safer to re-arrange the terms to have all the additions first.
Many errors are made if subtractions are done first.

=$\textcolor{t e a l}{7} + \textcolor{red}{75} \textcolor{b l u e}{- 25}$

=$57$