WEBVTT 1 00:00:01.200 --> 00:00:02.600 Welcome to module 2. 2 00:00:03.280 --> 00:00:05.960 Making sense of multiplication and division. 3 00:00:06.480 --> 00:00:09.360 This is lesson one multiplicative comparison. 4 00:00:11.160 --> 00:00:12.880 The learning goals for this lesson. 5 00:00:13.560 --> 00:00:20.385 At the end of this lesson he will be able to demonstrate and explain understanding of the difference between multiplicative ... 6 00:00:20.385 --> 00:00:21.728 and additive comparison. 7 00:00:22.760 --> 00:00:30.582 I'm just saying the mass structures or situations product unknown group size unknown number of groups are known to determine ... 8 00:00:30.582 --> 00:00:31.472 the operation. 9 00:00:33.560 --> 00:00:42.532 Solve both unknown factor and unknown product multiplicative comparisons with the model and equation using the symbol for the unknown. 10 00:00:44.280 --> 00:00:45.160 This is part one. 11 00:00:46.000 --> 00:00:48.960 Additive comparison and multiplicative comparison. 12 00:00:50.120 --> 00:00:58.182 And it's part of learning goal is to demonstrate and explain understanding of the difference between multiplicative and additive comparison. 13 00:01:01.080 --> 00:01:02.320 As a comparison. 14 00:01:03.080 --> 00:01:08.541 This compares to a mounts by telling how much more or less something is compared to the other. 15 00:01:10.560 --> 00:01:13.160 In this situation Kayla is 6 years old. 16 00:01:14.240 --> 00:01:16.040 And Mike is 12 years old. 17 00:01:17.000 --> 00:01:19.280 When we compare their amounts were going to tell. 18 00:01:20.320 --> 00:01:21.040 How many. 19 00:01:21.720 --> 00:01:26.160 More years older Mikus or less Kayla is. 20 00:01:27.320 --> 00:01:30.960 In this case Mike is 6 years older than Kayla. 21 00:01:31.600 --> 00:01:33.360 That is additive comparison. 22 00:01:36.040 --> 00:01:37.560 Multiplicative comparison. 23 00:01:38.200 --> 00:01:43.896 A two amounts by telling how many times greater or less when is in comparison to the other. 24 00:01:45.320 --> 00:01:51.003 We're looking at the same situation Kayla 6 years old Mike is 12 years old. 25 00:01:51.720 --> 00:01:56.126 But in this case we are saying Mike is twice as old as Kayla. 26 00:01:57.920 --> 00:01:59.880 We are using multiplication. 27 00:02:01.320 --> 00:02:03.280 To show the comparison. 28 00:02:06.880 --> 00:02:08.960 Let's look at some situations for both. 29 00:02:12.000 --> 00:02:14.120 Text Mark 5 minutes to walk home. 30 00:02:16.720 --> 00:02:20.000 It takes James 10 more minutes in March. 31 00:02:20.520 --> 00:02:21.520 Teresa's home. 32 00:02:22.240 --> 00:02:25.240 How many minutes does it take James to arrive home. 33 00:02:27.280 --> 00:02:28.200 In this case. 34 00:02:29.040 --> 00:02:32.600 James time is equal to Mark + 10 minutes.