Multiplication

What do you notice?

What do you wonder?

 

The students shared their ideas about the images. 

We concluded that 8 is an even number, because 8 counters can be placed in sets of 2 with no leftover counters.

Next, we discussed the following images. What can we count? How might we count?

We documented our thinking.

 

Key ideas:

• exploring the concept of odd and even numbers
• examining equal groups related to repeated-addition equations (e.g., 5 + 5 + 5 = 15)
• visualizing equal groups with arrays and area models

Unit Vocabulary

Then, we used manipulatives to create our own arrays. 

Making Arrays

• Make arrays with square tiles and record the repeated-addition and multiplication equations.

12

 

 

16

 

18

21

24

30

 

 

Same & Different: Rainbow Arrays

How are pictures A and B mathematically the same, and how are they different?

The students shared their thinking and reasoning. 

Finally, we shared our ideas about the following picture. 

Spring Garden

• Show what is happening using pictures, models, or numbers.
• What do you notice? What do you wonder?
• What math questions can you ask about this situation?

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