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Math Video Transcript

00:00:02.120 You can add like terms together to simplify an expression. 00:00:07.000 This lesson shows you how. 00:00:10.130 Now, let's learn the basic understanding in simplifying expression. Take these like terms, 3 x -2 x, as an example. 00:00:20.210 First, let's focus on 3x. You can see that 3x is equals to x + x + x. 00:00:35.150 Now, as for -2x, -2x is equals to -x -x. 00:00:46.010 When you add 3x and -2x together, notice that x and -x here cancel off. 00:00:54.070 Same goes for +x and -x here. 00:01:01.110 Notice that after adding these terms, you're left with one x. 00:01:06.140 Now that you understand the basic behind adding like terms. Let's take a faster way of doing this. 00:01:13.130 Just take 3 from 3x, minus 2 from 2x. Immediately, you get the 1 and the answer is 1x. 00:01:24.060 Also, one thing you should take note. It's better to write 1x as x. 00:01:32.230 Let's look at another example. Now let's simplify 7u + q -5u + 4q. 00:01:40.130 First, arrange the like terms together like this. 00:01:49.020 After arranging, you have 7u -5u and +q + 4q. 00:01:57.190 Now add the like terms q and + 4q. This gives 5q. 00:02:05.110 Add the like terms 7u and -5u. This gives 2u. 00:02:12.060 As there is no more like terms, This is the simplest expression you can get. So the answer is 2u + 5q. 00:02:18.240 So the answer is 2u +5q. 00:02:25.100 Let's take another example, 7 u + 3 v square -2 u + 5 v square. 00:02:32.220 First, arrange the like terms together like this. 00:02:42.150 After arranging, you have 7u, -2u and + 3v square + 5v square. 00:02:52.040 Now add the like terms + 3v square + 5v square . This gives 8v square. 00:03:00.080 Add the like terms 7u and -2u. This gives 5u. 00:03:06.240 As there is no more like terms, This is the simplest expression you can get. So the answer is 5u +8 v square. 00:03:19.050 That's all for this lesson. Try out the practice questions to test your understanding.

Multiple Choice Questions (MCQ)

Now, let's try some MCQ questions to understand this lesson better.

You can start by going through the series of questions on simplifying expressions - adding like terms or pick your choice of question below.

1. Question 1 on simplifying expression
2. Question 2 on simplifying expression

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