Model with Math | Problem Solving With Strategies
Introduction:
Equation:
First, find the equation of an array and add them row-wise or column-wise.
Example:
Write the equation for the given array.
Solution:
Here, there are 2 rows and 3 columns.
So, the row-wise equation of the image is 3 + 3 = 6.
There are 6 pumpkins present in the image.
Drawing:
Draw the image of the array and solve the problem.
Example:
Rachel ate 3 slices of pizza each day. Write how many slices of pizza she ate at the end of 3rd day. Draw the array and find the answer.
Solution:
She ate 3 slices of pizza on day 1.
On the 2nd day, she ate 3 slices of pizza.
On the 3rd day, she ate 3 slices of pizza.
So, at the end of the 3rd day, she ate 3 + 3 + 3 = 9 slices of pizza.
Therefore, Rachel ate 9 slices of pizza in total.
Example:
Hal arranged the leaves into 3 rows and 3 columns. How many leaves does Hal have in all?
Solution:
Here, there are 3 rows and 3 columns.
So, the equation of the image is 3 + 3 + 3 = 9.
There are 9 leaves present in the image.
Example:
Mindy draws 5 rows of stars in her notebook. In each row, she placed 5 columns of stars. So, how many stars does she draw?
Solution:
Here, there are 5 rows and 5 columns.
So, the equation of the image is 5 + 5 + 5 + 5 + 5 = 25.
There are 25 stars present in the image.
Example:
Nill has a collection of sunglasses. He placed those in 3 rows and 3 columns. So, how many sunglasses does he have in total?
Solution:
Here, there are 3 rows and 3 columns.
So, the equation of the image is 3 + 3 + 3 = 9.
There are 9 sunglasses present in the image.
Exercise
- 2 rows of apples. 3 apples in each row. How many apples?
- 2 rows of cars. 4 cars per row. How many cars?
- Write two equations which explain the array.
4. Write the equation by rows for the array.
5. Write the equation by columns for the array.
6. Jolene puts cakes out on the table. She puts 3 rows of cakes with 4 in each row on the table. How many cakes does she have in all?
7. Write two equations that explains the array.
8. Write the equation by columns for the array.
9. Write two equations which explains the array.
10. Larry puts cupcakes on a plate. He puts 2 rows of cupcakes with 5 in each row. How many cupcakes does Larry have in all?
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