1. WELCOME TO MATH
With your host…

2. 2.OA.4
Work with equal groups of objects to gain foundations for multiplication
2.OA.4 Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.

3. Rectangular Write an Discussion Arrays Equation
100
200
300

4. Rectangular Arrays
100
Can you arrange these objects into a rectangular array?

5. Rectangular Array
200
Given the array below. Rearrange it to make a different array.

6. Rectangular Array
300
I have 5 boxes of doughnuts. Each box contains 6 doughnuts. How can I count all the doughnuts without counting each doughnut individually?

7. Write an equation 100 Given the array. Write the addition equation.
Students could see the addition equation two different ways.
Student 1 – I see 3 stars in each column and there are 5 columns = 15
Student 2 – I see 5 stars in each rom and there are 2 rows = 15

8. Write an equation 200 Given the addition equation 4 + 4 + 4 = 12
Draw the array and be ready to explain your array

9. Write an Equation
300
Kurt has a handful of nickels. Help him arrange these into an array and write an addition equation.
What is the value of the array?

10. Discussion
100
Sally wants to count by 3’s. How can she make an array with a total of 15 objects if she wants her repeated addition equation to be made up of threes? What is her repeated addition equation?

11. Discussion
200
Write two different equations to represent 12 as a sum of equal addends:
by rows, 12 =
by columns, 12 =
Discuss how the two arrays are different, yet the same.

12. Discussion
300
Mark has represented the array below with an addition equation
20 =
Is he Correct? Explain