00:00This video is part of a Google Form quiz that teachers can assign to their students for homework.
00:06After the students submit their answers, then they can play a video like this one to see the
00:10answer explained. We've made more than 100 quizzes as Google Forms with free access videos,
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00:22description. This video is based on a question from an actual state exam. You may have one like
00:28this on your state exam. If you've already done so, we suggest that you watch the video on
00:34order of operations before watching this video. The directions tell us to simplify this expression.
00:42In math, the word simplify means the same as to calculate the operations in an expression.
00:49Here's a reminder of the order of operations. For elementary school, they're free boxes.
00:54The order of operations tells us which order to do things in. We start with the top box,
01:00then do the middle box, then do the bottom box. The order is parentheses, then multiply and divide,
01:07then add and subtract. One way to remember what words go in each box is to use a memory aid like
01:13this sentence. Please make drinks and sandwiches. The first letter of each word in the memory aid
01:19is the same as the first letter in the order of operations. We also write in a reminder that if
01:24both are present, then do the left ones before the right ones. Since there are parentheses present,
01:31we start by doing the calculation inside the parentheses. 12 minus 3 equals 9, so we bring that
01:38down. We also bring down the number 4 and the multiplication sign. The only operation left is
01:45multiplication. 4 times 9 equals 36. So the value for this expression is 36. Thanks for your attention.
