Vocab
What are equal groups?
They are groups with the same number of objects in each.
What is an array?
An array is a set of objects arranged in rows and columns.
Kelsey put her markers in 3 rows. She put 5 pencils in each row. Write a multiplication equation Kelsey can use to find the total number of markers and solve it.
3x5=15 markers
Draw an array for the multiplication equation 3x4
Remember rows go first :)
Check picture.
three rows of four.
2x1=1x__
2
What are factors?
Factors are the numbers being multiplied.
Veronica has 2 books. Each book has 2 authors. What equation shows how many authors the books have?
2x2=4
Mikey has 6 bags of marbles. There are 10 marbles in each bag. How many marbles does Mikey have? Write a multiplication equation and solve to find the number of marbles he has.
6x10=60 marbles
Draw an array for the multiplication equation 6x6
Check picture.
There should be 6 rows of 6.
Draw a number line to show 3x5 and solve.
Starting at 0 on the number line, you will make 3 jumps of 5 which equals 15.
When you have equal groups, you can multiply them to find how many there are in all.
7x10= 10x ___
7
Write a related multiplication equation for this addition equation and solve.
3+3+3+3+3+3+3
7x3=21
Describe the array for 5x9.
There would be 5 rows of 9 squares.
Linda sees 4 flowerpots. She sees 7 roses in each flowerpot. How many roses does Linda see in the flowerpots?
28 roses.
4x7=28
What is the product of a multiplication problem?
The answer to a multiplication problem.
Draw an array to show this problem. Marley's class needs to be arranged. There are a total of 15 chairs that need to be split into equal rows. Show me one way you could split these chairs into equal rows.
5 rows of 3 chairs
or
3 rows of 5 chairs.
Ellie has 6 bowls. She puts 7 M&M's in each bowl. How can Ellie find how many M&M's there are in the bowls? Please choose the correct response:
A. 6x7 or 7+7+7+7+7+7
B.6+7 or 6+6+6+6+6
A
Describe the array for 8x10. Then solve.
There will be 8 rows of 10 and the answer would be 80
Melanie uses 4 pencils to measure the length of a rope. Each pencil is 5 inches long. How many inches long is the rope? Draw a number line to show this and write a multiplication equation to model the problem and solve.
Starting at 0 on the number line, you will make 4 jumps of 5.
4x5=20 inches
What is the Commutative Property of Multiplication?
It states that you can multiply factors in any order and the product stays the same.
Draw a bar model for this problem. Harley plays 2 hockey games each week for 5 weeks. Then write a multiplication to along with it and solve for the answer.
Check bar model. There should be 5 squares of 2 which turns into 2x5=10 hockey games.
Solve:
8+8+8+8+8+8+8=_____x_____
Then solve the multiplication you chose.
7x8
7x8=56
Draw and describe two arrays for arranging 12 books on a table. (Not using 0 or 1)
Check pictures.
Possible answers: 6 rows of 2, 2 rows of 6, 3 rows of 4, 4 rows of 3
Write a word problem that could be solved using a bar model that has 3 boxes with 5 in each box. (don't forget to solve to find the product to help you write your word problem!)
Ex: There are 3 aftercare groups. Each group has 5 students. How many students are there in the 3 groups? Answer: 15 students.
Has to be similar to this example.