Question

use the array at the right to solve problems 4 - 6.
4 moses drew the array to solve a problem. what multiplication problem is he trying to solve?
× =?
5 circle columns to break the array into two parts. then fill in the blanks to show how you can use the parts to solve the problem.
(×)+(×)=?
+ =
so,× =
6 describe another way you can break apart the same array to solve the problem.

Explanation:

Step1: Identify rows and columns

The array has 8 rows and 4 columns. So the multiplication problem in question 4 is $8\times4 =?$.

Step2: Break into two - part columns

For question 5, we can circle 2 columns and 2 columns. So we have $(8\times2)+(8\times2)=?$. Then $16 + 16=32$. So, $8\times4 = 32$.

Step3: Another way to break

For question 6, we can break the array into two - part rows. We can consider the top 4 rows and the bottom 4 rows. So we have $(4\times4)+(4\times4)=?$. $16+16 = 32$.

Answer:

1. $8\times4$
2. $(8\times2)+(8\times2)=?$, $16 + 16=32$, $8\times4 = 32$
3. We can break it into two - part rows. Consider the top 4 rows and the bottom 4 rows. Then $(4\times4)+(4\times4)=32$.