Warm Up Question:
- To multiply objects in groups, what needs to be true about the groups?
- What is your favorite strategy to solve multiplication problems?
- How can you be sure your total is correct?
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3rd Grade, Mini-Unit 1: Multiplication Concepts covers the following standards:
0:00 Let’s continue with lesson 2. To multiply, count how many April groups there are. One, two, three, four. Next, count how many are in each group.
0:14 How many zinnias are in each group? There are four groups of two zinnias. Now you are ready to add or multiply to find how many.
0:26 Thanks for joining. All right, see you next time. If you use addition, we need to add four groups of two.
0:32 Two plus two plus two plus two, which equals eight zinnias and all. One multiplication expression represents the equal grouping. And zinnias.
0:44 Four groups of two, which equals eight. Four four times two equals eight. Now you try. How many groups are there?
0:55 How many turtles are in each group? There are five groups. There are three turtles in each group. Your multiplication equation will be five times three.
1:12 Use a counting strategy to find how many. So you can skip counting three, six, nine, twelve, fifteen. Five times three equals fifteen turtles.
1:22 Don’t forget to subscribe to our channel for more videos. What’s the mistake? Four times four equals twelve. Oops, the counting is wrong.
1:34 There are four groups of four buttons. So it should be four plus four plus four plus four, which is sixteen, not twelve.
1:43 So the mistake is the first group is four, and then this second group should be eight, twelve, sixteen. Thanks for watching!